Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06f6003273160e3…

MALICIOUS

PDF

77.0 KB Created: 2021-10-01 09:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 04d78754a5ab2fb1b654fee28e09b123 SHA-1: 011fd968432e896c74b82f2a29888cce7d4107db SHA-256: d06f6003273160e315d8e794f49019a008df52e7869af1db26ab1c442fe00e4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or content-luring mechanism. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document, likely used as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2b9b3c73e06c746079db6e09d87af54c/lefep.pdf In PDF document text
    • https://sakura-bashi.com/uploads/files/202109302030453274.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/lagon.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/moxinesodoradopugiredira.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/lerizumumejizojogemo.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/giwidalofe.pdfIn PDF document text
    • https://actor-conseil.com/files/file/zivikatep.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/zowumamarukamuxurikiv.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/riluruzijupam.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/20029784307.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/9515040405.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/bozogidojomixobu.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/mifigugovukodono.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/27911100531.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/89901619439.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/sosekamen.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/bariwusu.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/53780726705.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/20460421972.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/kilap.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/xusokigojubovuzij.pdfIn PDF document text
    • https://arteziano.ru/ckfinder/userfiles/files/73086774159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=redmi+note+10+pro+max+software+updatePDF 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_off0000bef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 19580 bytes
SHA-256: 90d9bca72174d3cca0d239cffeadde62f182d57b379d35ee9f441f3b44e7789a
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 11120 bytes
SHA-256: a0ebb98dbb1d534bbf9590d3392c2ba9a155311f4c109fef7a7c41962bb6c719

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