Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b05c12a8f5d8ad…

MALICIOUS

PDF

78.7 KB Created: 2021-03-02 03:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3ea0cb73bec40065b602364138ed98c7 SHA-1: 202b930454154c41a3c3aa19dcf5a24a172af423 SHA-256: e1b05c12a8f5d8ad8f2a1a98c62f76a47d1b55e0ffeeed2cbdc734f83df4591b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/wix?keyword=words+with+%25C3%25B1+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422631/normal_603b355e2260a.pdfIn PDF document text
    • http://menformula.xyz/zitur3yj3v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_600fd17ab3ad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_5fdebbbe4b644.pdfIn PDF document text
    • http://datekal.22web.org/ambiance_lighting_transformer.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/gihigig/ppsspp_gold_psp_emulator_1._8_0_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/Zighd7Y/16741715083.pdfIn PDF document text
    • http://yourlivehelp.com/taylor_princpios_de_administrao_cientfica94y24.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/41hpQG9/charge_2_vs_charge_3_vs_charge_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_5ff26de40a4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_602f3d67b6bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_602a3cf47113d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370071/normal_5fc61d5448e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_600d280aa15d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602c1b864b10a.pdfIn PDF document text
    • http://complect-tech.ru/87077395339sor9m.pdfIn PDF document text
    • http://souve.me/96396971104nwor7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirulumen.rf.gd/after_effect_template_video.pdfIn PDF document text
    • http://nanugubodiw.epizy.com/bufosujokakatufumumifan.pdfIn PDF document text
    • http://muweluboxakok.rf.gd/all_guitar_chords_chart_free.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/68173783816.pdfIn PDF document text
    • http://gimezevu.epizy.com/sultan_bengali_movie_video_song.pdfIn PDF document text
    • http://danofef.rf.gd/80100539463.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 3396 bytes
SHA-256: dc4d71ce285fdcd5cc190f2ac55ebe161f09300daf516bb9704fb6cb06182250
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 5332 bytes
SHA-256: 41a2195e650deb093ffd1beb47f1556478700447d16c1879a478c6460f0bc325
font_02_sfnt_off00010611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10611 11368 bytes
SHA-256: 31da4eb077d196976141c8194a8d2dfd0d5089feb66d7f186c178c66fcb0677d

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