Malicious PDF — malware analysis report

Static analysis result for SHA-256 407e288508de66ff…

MALICIOUS

PDF

79.3 KB Created: 2021-09-17 07:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4b0d486238bc01c054804e98ece73a25 SHA-1: 1703c94bf5ea20fc6737b0225d5ece915fc6e657 SHA-256: 407e288508de66ff8cb35171ca6669c41f0b8042b255e380c6d1e7c82e6c311f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=movie+maker+offline PDF link annotation
    • https://sportnazona.bg/f/uploads/files/mosolekixozurigabosokixo.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/pomarujeg.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/jemofilijixugisejo.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/lidodegavuwizitosixak.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/tusevezezorerumeripotef.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/dafoxi.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/mubazo.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/535733557.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/80663740253.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109110658114950.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/40423386504.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/37794385375.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109032312331545.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/wobusosexefofikimizewiwa.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210902215602.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/mopufogevenif.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/29388802077.pdfIn PDF document text
    • https://mytopics.it/uploads/file/pazuf.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/wotumitobur.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/kojubovipekigovame.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/80233663881.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_off0000d7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 16020 bytes
SHA-256: dd76ab65359570e250df04fbc3784ffae397307148dbfb12db661eb51ea0cb70
font_02_sfnt_off00011949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11949 10260 bytes
SHA-256: 12cbc73c44076a9868cd38f85ad3034e806595b16abe29f1a01ba57b5bc2928c

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