Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dd3fd5fb415507…

MALICIOUS

PDF

71.2 KB Created: 2021-02-24 10:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 52b002f5bcfb444b80361ec672c5d048 SHA-1: 64e1cdfe3839f0840f69fb3e080bcfe60c0beafe SHA-256: 06dd3fd5fb41550779098e37ac0e4427442b765b6036da1a96d6b8aaff876e0c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one prominent URI pointing to 'seumenha.ru'. The document body, though heavily obfuscated, suggests a lure related to 'grass carl sandburg analysis', likely a pretext to drive traffic to the malicious site. The presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=grass+carl+sandburg+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468551/normal_6016ebab493e5.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/advjjhd/star_realms_crisis_heroes_rules.pdfIn PDF document text
    • http://baffer-shop.space/lagaxajuguxodod3izly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_601452cabeb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_601f31b44671c.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/7wjkJ1V/mapikab.pdfIn PDF document text
    • http://copyright-infringement.business/badlapur_full_movie_720p_blurayhlmes.pdfIn PDF document text
    • http://fdvsefwfrw.space/98629068206iyh10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458421/normal_5ffa663067ae8.pdfIn PDF document text
    • http://cozyplacefor.rest/nujozorezexipedujetxiynz.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/zaxuledo/fiwokefaxokesukopu.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/wapking_laptop_games.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_off0000db5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5A 5380 bytes
SHA-256: 6ba30a70f60673b319ccf4efc54adc03dab06a36d27974cdb2d91e7b69eff0c7
font_01_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 10196 bytes
SHA-256: 0d4edf0561d19d6f369042bd7dfcf83235ba492a2436ef8aff0309d7ae48c88d

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