Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab7d860ec4043e1…

MALICIOUS

PDF

81.0 KB Created: 2021-09-08 19:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8577a3184b54daafd2709c9d383159b7 SHA-1: 597de143043f5e545459ab0acb3495c7b7680607 SHA-256: 2ab7d860ec4043e16792fe7acd4c6643a9a0c1d45dc51d1d8f51ac90dea05611
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URLs, many with 'utm_term' parameters suggesting tracking or phishing lures, points towards a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://coretry.ru/uplcv?utm_term=adverbs+of+manner+worksheet+grade+7 PDF link annotation
    • http://dobrasekacka.cz/userfiles/file/9540923173.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/setotidipokowel.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f5987a7f6---fuwomolekodediposuvemasa.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/38533634180.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/90117354395.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/bopebonegi.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75330827011.pdfIn PDF document text
    • https://quizai.com/uploads/files/29705269235.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/gifibetunomodaxo.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/maxewag.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/28567817751.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/dijozisurajezalope.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/39070233210.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/guwililetikotaropalun.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/22681476643.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/rodovixigixigusorovexoz.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/gojufak.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/rogiriwanomefopikavomuve.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210903040308.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/vesozewuxawewojet.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/40770808095.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/31180751957.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/sulazipoge.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 17632 bytes
SHA-256: 4fba8f233ddd170d7c9771ab664eb3505d6006560103446b00dffc3dc1857abc
font_01_sfnt_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 11080 bytes
SHA-256: 9572bcb497f501bbd5e5de2e6b334ac1b73cab70ea8601b589cf31489772675e
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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