Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7edb947387c2de…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 18:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ef5ccbc64d42b1cc1099eda5253e06c9 SHA-1: ddfb0487fd6027f9abfaf40c9cc163b70bd03284 SHA-256: 7a7edb947387c2de1e2d34f77303f46d42c4ce12e5a6c130fe7a44eb27091e5c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, flagged as a link farm and indicative of phishing or malware distribution. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://candientushinko.com/images/file/96987955689.pdf In PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/77226678207.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/48353827211.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/legijowanul.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210913_E5C910F560F1E81A.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/katuwatobidekozutugivajum.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/91258546749.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/detezewoxilad.pdfIn PDF document text
    • http://www.ximangsongthao.com/app/webroot/uploads/files/keledixofan.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/labupumerufebidazodip.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/kuxizabomadekoliguxo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142dd9b220b7---79853395414.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/78094724166.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/tunefalenetewolu.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/8728276580.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/vexeberomafomumaxelaxi.pdfIn PDF document text
    • http://ashioke.com/images/library/File/76948483096.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/99063271436.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/611va41hqufhn3d20b0fsk7fj2/firomomudipibowavelim.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/83806406456.pdfIn PDF document text
    • https://angkagenap.com/contents/files/25375101170.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/semusabodugusanoni.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/97270766241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=get+android+11PDF 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_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 10120 bytes
SHA-256: 6991db3c4b5fe89673050c4073d3275310adf604ee668a8562d59f3abd8ca1ef
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 17296 bytes
SHA-256: d2a5e4d7cc795ff421b91b6e946f32d35a31c88d47c1587ec70eb30e543ee8ac
font_02_sfnt_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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