Malicious PDF — malware analysis report

Static analysis result for SHA-256 401f9b772c4efeb8…

MALICIOUS

PDF

67.8 KB Created: 2021-09-27 04:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5d49c3233afcef9e6d4493b77c71feff SHA-1: adde2c29daf239e87d4b255961a7b5c69439a487 SHA-256: 401f9b772c4efeb87f36c956ab3c1e16295fc146237a496cac2db63a8d214acf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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://crysiq.ru/uplcv?utm_term=android+cihaza+windows+10+kurma PDF link annotation
    • http://lecostationery.com/files/file/nazamujupusogokowi.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/zebolufofud.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/41783806589.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/rivenabobozupe.pdfIn PDF document text
    • https://slicktechproducts.com/newerac2c/userfiles/file/19493705227.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/76742704031.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a31a0a6ad2---vojamedujenox.pdfIn PDF document text
    • https://zhansq.cn/upload/file/18920470593.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/92001782613.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/69722781241.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/riuot8ruh0qkufep1giu6h60ks/kubuxaxusosanumesi.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/xasoda.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/81304153478.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/zegiwunarofamod.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/80847121025.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/17082667623.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/53361733808.pdfIn PDF document text
    • https://umutfm.com/resimler/files/94473354241.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/17504393516.pdfIn PDF document text
    • http://e-sheremet.com/img/falavokususirepafobepinak.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/45309625317.pdfIn PDF document text
    • http://travellerisland.com/files/xonexuvutidudubutugopex.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/79453218337.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210917/16318507545915.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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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