Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e84b5c54756ad3…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 11:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: acc013aee36e5b45e4c36980695d1201 SHA-1: 482dc5d48b5ac2ffa32752cb8229905e0b36d0a5 SHA-256: 70e84b5c54756ad3f88a0f9b2dc7745598721655172ac7168206697a77865e96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being a link farm, with many URLs hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs further supports this, as they likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.anclupnapoli.it/userfiles/file/444441790.pdf In PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/gasibel.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf4cc08ae---tofizuferegimek.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1512b8863d232531b84cdeead1b56a48/penatolawesukapuvese.pdfIn PDF document text
    • https://ancoraeducacion.com/images/59339918011.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/35879376848.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/0e86c22a3f67ad6bb9b92c2d71086821/zigovomilararoxiwor.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/84976398056.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae5e23916---96066807547.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6fa9f527ad3064087f1d19037845d61c/xudikojerikujatoven.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/pekufelala.pdfIn PDF document text
    • http://bcwapparel.com/userfiles/file/wifizaderatawazivu.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/gad6afs5o181bbfd96p3mq3vp6/feziduzonudipawekenixikob.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/12159494151.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df358de14d---16475216894.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071c2ae635d1---ragujazo.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/58313825919.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/58889185695.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/55092975363.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/naxenadopubuxuf.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/t7v81kdvlmndlq8f9rmgnl1r16/xuritojotetabusegolajizut.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608935103f4ec---11124379703.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1cbe69a2ae2fb8c5688d09b6bdf84f44/kujosor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=promoting+gender+equality+in+the+workplace+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 15788 bytes
SHA-256: 797c2c040ad1bd818602c89277805f40fd93df42938e444a0956c38b2f0fc4d3
font_01_sfnt_off00010176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 11436 bytes
SHA-256: 2f34d7f3359e788933ad975d1b776200c77abf475694c06d9c2a1fe3f2a877a5

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