Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a20d94f1c54d026…

MALICIOUS

PDF

92.2 KB Created: 2021-10-05 23:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1b5de984e7bcca7dcabc947fd80a5489 SHA-1: d3566782111045a0a6277120b107d8c7f3e07c66 SHA-256: 8a20d94f1c54d02631b3af2b95e0e64695191fe6a749254468acf441709769eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or redirection scheme. The PDF's structure and the presence of embedded links indicate an attempt to direct the user to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/20690381644.pdf In PDF document text
    • http://patrick-vallot.com/upload/files/zofadogoluwexukadaji.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/78003084049.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/41582994356.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210921_110109.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/pawasuwo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/cb222d7911f0f7352e79f11a23e7b786/84634571054.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/23390520274.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161581d2dee0e9---xarijonupupuw.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/wufoteju.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/77809499282.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/wowepav.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/dubojol.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/61656062581.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/66112971591.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/jovolotupuwenukatulemivo.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210913_799E9981500F6012.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/zizinesuzapemaxek.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/depumopodafosa.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/telufiliw.pdfIn PDF document text
    • http://chapelguild.com/images/usr/82021277292.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/48971937180.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/silitilesitetex.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210907084858_cmVwZXdpenVrZQ==.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=science+and+technology+class+9+practical+notebook+answersPDF 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_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 19008 bytes
SHA-256: 75d8e678b520795aa36492443e10ffc67b8cb13526099e496a00dd604f1e061b
font_01_sfnt_off00012f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6D 11468 bytes
SHA-256: 30014e4fbc5590d41d998bf5dc03abc1e994231f6eeffc19363195eca1a64a66
font_02_sfnt_off00014a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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