Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f777cce846521f…

MALICIOUS

PDF

83.9 KB Created: 2021-03-25 05:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 57b75dc5a1cc03f8b0f1a76d21f34b00 SHA-1: e5ef1a4410a368dfc2517015a113658cdb7483a1 SHA-256: e7f777cce846521fd1fc6e575bb79d28591444f3f55285bdf792761f725ec9a2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic flagged it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=baby+trend+sit+and+stand+instructions PDF link annotation
    • http://xoxanuf.mygamesonline.org/23167326570.pdfIn PDF document text
    • https://vutetubefot.weebly.com/uploads/1/3/4/4/134431977/vaduwexekir-demedobafox-gijasufizela.pdfIn PDF document text
    • http://comp-arenda.site/android_sdk_manager_not_opening_windows_10v5shs.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/gezaritosok.pdfIn PDF document text
    • http://meetcabinets.xyz/79093711986qel31.pdfIn PDF document text
    • http://begdas.space/2008_hummer_h2_repair_manualanc8o.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/is_gimp_a_safe_program.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/bienestar_animal_en_clinicas_veterinarias.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_604fc50da559d.pdfIn PDF document text
    • https://lumosezuto.weebly.com/uploads/1/3/4/4/134499790/padulukolaviw-nutazumevep-mafopide.pdfIn PDF document text
    • http://muldwych.com/306712541309mqgk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_6014dd15d149e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_8c7afdcf5e574f48acdfb3a91bbd10fe.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_a354e5eae1324d318732f99c494779b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daniwodug/is_kaido_the_strongest_yonko.pdfIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_595f0e1c63f1422380cd93a5d2907c1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/therapeutic_guideline_for_hyperlipidemia_severe_acute_pancreatitis.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_49db847ebaaa4bc3abf9c6d4fdb259f9.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 5192 bytes
SHA-256: 6dc67fc849ef40309c840fbdb3ea6a4df888a2d846b06aff61a0b0a3c774394a
font_01_sfnt_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 11336 bytes
SHA-256: f093b5c00c0b2d33ea1b8b1cab4846da98b54901c5d62c587fb5d516c3a5ce37

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