Malicious PDF — malware analysis report

Static analysis result for SHA-256 3941e8e46ad27b49…

MALICIOUS

PDF

79.7 KB Created: 2021-02-24 03:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a4d4acb77adce4ae49e0d94651d49154 SHA-1: aa9d7194c44d4d143c44498e66744fa0a0596fea SHA-256: 3941e8e46ad27b4922fd862f8fbf573041ff3ffb9e8a3801e167e5b02c4dbbb2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, including a primary link to 'https://maypoin.ru/wix?keyword=cunningham+cable+tv+guide', which appears to be part of an SEO link farm. The document's content, though heavily obfuscated, suggests a lure related to a "cable tv guide". The presence of multiple external links and the SEO redirection heuristic indicate an attempt to drive traffic to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=cunningham+cable+tv+guide PDF link annotation
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/7b59ed7062.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/heiihej/31286243787.pdfIn PDF document text
    • https://jirilerimu.weebly.com/uploads/1/3/5/9/135967849/bafejago-ludisadenutawu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/go2hjbr/touba_hair_braiding_columbia_sc.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/3b0d4fc7.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/jfThfgi/560475009.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/6745666.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/Kjaifji/sanerevogozunorerax.pdfIn PDF document text
    • https://niwosegebopusa.weebly.com/uploads/1/3/4/5/134583118/4823294.pdfIn PDF document text
    • https://xidekudogigut.weebly.com/uploads/1/3/4/6/134683706/a1933.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ximupuv/6082162580.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/66127447487.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/anuraga_karikkin_vellam_bgm_free.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/59569223073.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/vetip.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/distribucion_uniforme_continua_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/beamng_drive_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/chameleon_run_free_android.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 5184 bytes
SHA-256: 4f6f63178a8b19115a9e89a2ded098669d3716b3a30daff51b61d8dfd01610bc
font_01_sfnt_off00010d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 10768 bytes
SHA-256: e9705ad5c9e7db9bed84b6e1c5ae7ca60c6a644f32b306dd3fede52a85bd65cf

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