Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64ed7f35c9a6021…

MALICIOUS

PDF

83.8 KB Created: 2021-09-04 00:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bdaed5d4fca6fa2dcaed2a8b22e4fd60 SHA-1: dcf477db1b8d17863fdf1e78b1bab5f420457426 SHA-256: e64ed7f35c9a602165e03c7c26825c801d9c08a35b8720042e35825fcd80f1cb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific intent beyond directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/932b392ef341b193bf34f58592e842cc/58356744313.pdf In PDF document text
    • https://sicurezzaips.it/uploads/file/76386011897.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/penavinotu.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/64073592844.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160821c54d4e7e---losufefopulutuba.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/narezetuvawogumazijewak.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd60e7c6cf---lufovelagodesexuxavopade.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609da78b869ad---kaginuredawumexokur.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/fazasunuwilawexu.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd94ea031f8---mumibep.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/rozefidebosurox.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e000c5403---vatebezeporetifej.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5136a7ef2d---91070291286.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/73479646853.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/ea0d0da8b251b1df9033ee71988454bc/94140540759.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/70684728017.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/ledokiragorazuf.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/u6m8p417looisukma362f6i08v/66288248231.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/kigonotopo.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703ebc7b8e4---labajimarofadutakulajadek.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/e67d6ceaa28ff141d7c65818204b4a7d/juranij.pdfIn PDF document text
    • http://www.siposferenc.hu/html/siburebis.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/p9l96mfroop5hp7lplde1om7ls/860223038.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/wutefozoka.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/i7p1sa7hkt0jpp6goq2s4haf73/siwusabetu.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/mefazutuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=upsc+maths+syllabus+2019+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 17848 bytes
SHA-256: 168b51b6b419cc30cf9b18847c5fc6b96e40cab36f38e10631860f2abececbf1
font_01_sfnt_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 11160 bytes
SHA-256: faffc6e4c9e1ba7f89bbdc8aa32211d887fcac36347da468c29cf2e6ba5892f7
font_02_sfnt_off0001296b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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