Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0208d2f9a083493…

MALICIOUS

PDF

77.6 KB Created: 2021-09-17 16:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 795c7f0e3e3e239474daed03d96789a7 SHA-1: cb576be41f1e3038b9dca060e0dd3d514847b3e4 SHA-256: c0208d2f9a0834939b6cfb6fdb23c2d6b3c8a2d46a98fa09077a6ede8c9fc7f5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The PDF's structure and embedded links strongly suggest it is designed to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7520

Heuristics 4

  • 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
  • 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://archism.ru/uplcv?utm_term=auto+clicker+for+chromebook+roblox PDF link annotation
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/25001118759.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/75767016751.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/61549898084.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/23717029398.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/56619847146.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/5409330796.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/sitilekaxubinejele.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/21075853451.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/saxoroxebugekumuwo.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/73484374520.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/52919661960.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/mizukod.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/68391856093.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/pazusobonavabewimebemegi.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/66786776865.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/42454572799.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/pujiwomerisajiwanakeru.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/96318917084.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/sujepekegunulom.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/zugew.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/ramifubedumuxetijiza.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/xazuxesokosinedadebemujez.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/79943887756.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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