Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d80fd151002aa8…

MALICIOUS

PDF

72.1 KB Created: 2021-09-15 22:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0201376e32ff08e73d3d3cb7cd06957c SHA-1: 3e9f72fe5a4727b2e4bda418437475f8c29399f5 SHA-256: f2d80fd151002aa85ce0d6d61219eba5bf0daff12bdd1efe64cb60ebb7a19155
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards a spearphishing attachment delivery method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://queure.ru/uplcv?utm_term=apks+like+mobdro PDF link annotation
    • http://crmrealty360degree.in/ci/userfiles/files/talimumin.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/40230561836.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/89323227680.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/voroxi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161410ef7172c8---15643491984.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/tinifolavokivamaga.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021090111540326280.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/fazunorozufomufajigoja.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/vajikivixipot.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/duberexovimurizixira.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/11272706889.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/xigikuminagopu.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/3531652283.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/mezuxugoxumu.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/16500822794.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/18330249663.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/97493301382.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/11589271314.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/dc037e272e2a86640a4b15161fd98f43/revedugomebajefebepev.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/zilisiwimuforinoke.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/77236747659.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/sisewotitarumelolazej.pdfIn PDF document text
    • 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_off0000b87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87B 10404 bytes
SHA-256: 78148505772c32fe1761d087f016b9c8f24871259e9e86eccc53f91ba1403381
font_01_sfnt_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 17084 bytes
SHA-256: 2b5806d555afffabfc65fc6548f53393bc6e8d537ae78fd7dac522bd08ce6dff
font_02_sfnt_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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