Malicious PDF — malware analysis report

Static analysis result for SHA-256 a945bbcabe100d1a…

MALICIOUS

PDF

77.3 KB Created: 2021-04-25 00:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7a8cdee6cf5b057a22ccaf461a5466b7 SHA-1: 64568f4c0012f0f53344a097f74fc45dad61cc1e SHA-256: a945bbcabe100d1a10f6f14c76be5a93d520970e182c2cac502ab0197f1acc24
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 numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme to deliver a malicious payload. The document body, though heavily obfuscated, appears to be a lure related to a strategy guide, aligning with phishing tactics.

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://resalured.ru/strik?utm_term=pokemon+black+2+and+white+2+official+strategy+guide+pdf PDF link annotation
    • http://reduslimitaly.website/235375557369t5jx.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/jbsxhcV/tuzuvejaxomenawidovuju.pdfIn PDF document text
    • http://hotsales-com.xyz/teacup_pomeranian_for_sale_in_ohiok56rb.pdfIn PDF document text
    • http://ibkreactiva2020.com/zoom_h4n_external_mic_jackpvg7v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402949/normal_5fddb3985d667.pdfIn PDF document text
    • http://meetdouche.xyz/rules_of_crib_3_playersh182n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_6031b42201b6f.pdfIn PDF document text
    • http://metaleagle.ru/7208457856qa784.pdfIn PDF document text
    • http://dagisigonalin.22web.org/catheter_associated_dvt_chest_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fd66fa212e8c.pdfIn PDF document text
    • http://nalovegitiga.22web.org/6143165191.pdfIn PDF document text
    • http://klyshsheff.xyz/lusotamafotevivuxi21ejz.pdfIn PDF document text
    • http://formverifiedbadge.com/zapenojenoretimanapurivpezs4.pdfIn PDF document text
    • http://ewop.space/gaweligutuvamilony0ua1.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jgxhh93/21078065992.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/89deb47f-b33c-46fe-89a0-da5adcb7d81c/voluredatuzopobudew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8a46df-1eb3-4811-9f93-a13b6b147fc4/motorola_talkabout_t600_manual.pdfIn PDF document text
    • http://niribulikebi.rf.gd/free_audacity_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21012af-2890-412a-86ea-93314b35aeb1/8149189566.pdfIn PDF document text
    • http://gapibixofezutef.epizy.com/kapumurax.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_off0000d8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AA 5492 bytes
SHA-256: 1bddd25af1e90ef9c16bacebdeb31bfe0079550e65ce1a0fe56aa48b50861b6a
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 6100 bytes
SHA-256: 8b74453b0060a1662f86da63f6b8a9602bd4a87b8af070a1691c6a349430e6ae
font_02_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 11312 bytes
SHA-256: 3d36da8f39262a321499fa56cf29879d8917e3fad8f3c54364ae07e3a8638241

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