Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93f3e38662c63bc…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 04:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1c806dbed445f143c227d03b64031863 SHA-1: 5ce38b12244d9e48b47086894d83b66b7efd611b SHA-256: e93f3e38662c63bce84b95b917aca51acee726689d455c8497d4eaec8454fd3b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document is designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/award?keyword=commentary+starters+pdf PDF link annotation
    • http://copyrightshelpcenter.com/fajusexxt3c.pdfIn PDF document text
    • http://storeplus.pro/dell_precision_4903174n.pdfIn PDF document text
    • http://drovazvenigorod.ru/72938592889trxjf.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/download_beauty_and_the_beast_movie950op.pdfIn PDF document text
    • http://genusadnlo.space/banopizararfv35v.pdfIn PDF document text
    • http://muslims.net/fatidajubaxaxuxokusufonaduppq.pdfIn PDF document text
    • http://omynutural.space/360370294650ci0v.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/fallout_4_console_commands_companion_perks.pdfIn PDF document text
    • http://dutalamujuso.66ghz.com/your_lie_in_april_clarinet_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibubifo.rf.gd/52647716677.pdfIn PDF document text
    • http://kodabaguditu.rf.gd/ontario_online_boating_exam_answers.pdfIn PDF document text
    • http://werokixa.rf.gd/dental_plaque_biofilm.pdfIn PDF document text
    • http://nisoruv.rf.gd/lejatojupuzikatimezebas.pdfIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_4cbcba498f9d4e01b43bf24f87fae5bc.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_82c5b698c3b64ee380daed497105755b.pdf?index=trueIn PDF document text
    • http://magikid.epizy.com/68678894617.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/todupimi.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_1d5676dc6f77454d871af7dfd6f78fbd.pdf?index=trueIn PDF document text
    • http://saritimiramig.rf.gd/bukukefofobi.pdfIn PDF document text
    • http://kexejitevomosef.rf.gd/palexidaki.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/mowukovatigizodefudulo.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/ribinorarenibavefodoguja.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_4db2715bcff34ef3ba1befdf106066d6.pdf?index=trueIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_1a4271d69bc94f71933fd8366ff8baf3.pdf?index=trueIn 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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 5160 bytes
SHA-256: 5e919d8dcc044e6feadc158b4de26f9f33bb8f28450776c0a9ebf52b7f46a1d4
font_01_sfnt_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 11196 bytes
SHA-256: f5e588c38786ab6dd5f5fd21ed46b79c4da82b3f01483ed65c67b8ddc2618693

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