Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba35c45ad7593657…

MALICIOUS

PDF

85.1 KB Created: 2021-09-11 18:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4e5d19eebff6efdc5e987717b8044337 SHA-1: 931246c54528f38b89d8c4758ffa726efd047f0f SHA-256: ba35c45ad7593657ad99458c3d6b8f35a3cc639213a6e93937e3dfd85a9f7310
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://philabc.ru/uplcv?utm_term=apps+running+in+background+android PDF link annotation
    • http://plechotice.sk/tmp/file/siwuzuvenazaxek.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/90420195636.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fixamigaxupob.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/90107753691.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/renujulunumuf.pdfIn PDF document text
    • http://yoron.net/up/files/61653403985.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/42045878290.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136775560e8c---59624889514.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/75865350906.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16139c716895df---femedagojudub.pdfIn PDF document text
    • http://saint-party.com/media/file/62669863326.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/2433436392.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/df327d3e59c6b10a90f4c278d0d5d8dd/94740471988.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/2826815245.pdfIn PDF document text
    • https://nasikampung.info/contents/files/fesavaduvawugivogumu.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/dijopew.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///24167614560.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/wiwomukuti.pdfIn PDF document text
    • http://prompol.com/media/file/4707167579.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/wadota.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/79714876691.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/5455368006.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_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 17324 bytes
SHA-256: 50b49984b29477b136c8762e2a8b4cd9a6f00686ca301e2a2f0a423d103ddb0d
font_02_sfnt_off00012e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3B 10728 bytes
SHA-256: d6028a9d9ec4902c9b63b98b8ae92ca8271308f01d7aea648e1ea8cad74a6785

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