Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9fa2606fe6932b…

MALICIOUS

PDF

84.9 KB Created: 2021-05-13 23:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a48da5b14ce2c12508d27f0d1649c6a2 SHA-1: 27c0df33b095162f9072dd4ab7e70addd66053b9 SHA-256: 8a9fa2606fe6932b400ed4b00cf9bf7b1122962ad3623037b08ba7c555d36dd3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=how+to+head+clean+hp+deskjet+2135 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fe8f0fba384b.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/8lgjAii/40113980659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404723/normal_605bbcd4a6f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_60251c0cbf133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fd1281b4cefe.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/cgcFlgo/virgin_pulse_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/liritefebat/fr9EJhh/48639645503.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/1Yhh5ji/99217598770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6038d299b015d.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/lxVlgfC/dobunulagasijemutorobotof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_602102c0772ba.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/hhji8e5/14996588502.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/bY1Hgjl/bonefug.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/djgNjiT/ios_app_store_download_in_jio_phone.pdfIn PDF document text
    • http://rapegupuv.iblogger.org/zewakogivujubetorovo.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/hpROjcc/72763922223.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/gjf0qjb/zain_online_recharge_ksa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_600b70738a673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelaleted.rf.gd/vewazubogar.pdfIn PDF document text
    • http://pikawin.rf.gd/spatial_data_management.pdfIn PDF document text
    • http://gigidubuvo.epizy.com/xerukegud.pdfIn PDF document text
    • http://wuwokumafinu.epizy.com/92374490849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555cdc84-56f5-47c3-819d-0630ecbfa4ce/mary_rowlandson_a_narrative_of_the_captivity_and_restoration_of_mrs._mary_rowlandson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5baecd04-932c-4c2f-b206-9fc9d68115f9/13627665336.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_off00010af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF6 5732 bytes
SHA-256: bde58dd0466a249402fb95c14c6e3345effdf424d47887be8690c44c357a90bc
font_01_sfnt_off00011e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 11488 bytes
SHA-256: 3ab5e59511682011d16a5b93fcfbcb9fd30c6fad1021d499356f829298b6d0b0

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