Malicious PDF — malware analysis report

Static analysis result for SHA-256 658698cae58a0747…

MALICIOUS

PDF

94.7 KB Created: 2021-07-06 20:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 73ae58d0016e418689cab31e2599d716 SHA-1: 8252b0a2a5242baa70f3063f575d6e804cd3080c SHA-256: 658698cae58a074761c281d38688f614e875019781a6f2271b5cef096996ce99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use formcraft plugins for file uploads, suggesting an attempt to host malicious content. The PDF's structure and the presence of external URI heuristics further support its role as a delivery mechanism for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://timandlor.com/userfiles/file/94304528517.pdf In PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dc4e95190---75612925535.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/30637769646.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ba60a6ca---tawazoxalaj.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983a0fa5ba5---82447317822.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/53b88d7ca04f3a0bf5047cbe949e8833/19773698240.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f163684600---nodepotusuvagixolugor.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b69b380479---narebunajarokotim.pdfIn PDF document text
    • https://t2sc.me/userfiles/zexobewawemibidadawupu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/r7qr10gpknnjp0ru57jbtd4c4i/sosevutifilimuwan.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/defdcb084ce2e3d109ed25375880f9aa/rilulotubibelofimomakim.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a426e77e6bc---39744754778.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/6816ef4d751a339a31e5badb17c36d42/vumaxokesamafoseke.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/7d18cddf92ab9d3942c49c8d7ffb955b/pivujefugo.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e276da7c---55749406396.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202151884376080.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/burisavowejitibo.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074108b93ed5---68646424863.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a20902806---1997838868.pdfIn PDF document text
    • https://shopabrang.com/images/files/78361235171.pdfIn PDF document text
    • http://elma1.ru/!upload/files/35951050931.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cqns15qttdsjb5ji2dbe7kv8n0/65823167659.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-25/20210525125158585042.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/samunurolam.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/sodexijazifovusopoli.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/bbd65c79eb02e7089f1ea23f9e3efcc2/20737882510.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093355c1d697---283417118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bom+diggy+diggy+song+download+pagalworldPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000ef03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF03 18612 bytes
SHA-256: f02c712852498835430212ee2cc53ffaac83910b0505cc1956f9f5baae241229
font_01_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252F 17788 bytes
SHA-256: 8f8964a60cbb2a8fc7caaf82b0299d41efbb879b074aa786a837214285b117ff
font_03_sfnt_off000153ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EF 10760 bytes
SHA-256: 6638ce45d65c7b1e021e72aeab8d95dcafc445064d3d940a5713e73dadc4873a

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