Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fd9ce5ff40b866…

MALICIOUS

PDF

75.5 KB Created: 2021-02-23 10:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 96587f5497a33ada55142b4c401addcd SHA-1: 938b3fbff8056c95b2b275fe0340f4bde6d826c8 SHA-256: 84fd9ce5ff40b866596aa1274f99f9b504a29cdc0cecf6d99590eed55cb26b7f
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=huskee+lawn+mower+parts+blades PDF link annotation
    • https://tofigota.weebly.com/uploads/1/3/0/7/130775321/misetewokutaxa_firoker_kogakevijomifeb.pdfIn PDF document text
    • https://xefesikixote.weebly.com/uploads/1/3/1/4/131437823/niguneg_xetevugagujugel_fuzasulixuzudi.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/Fhbjfhg/munubuvor.pdfIn PDF document text
    • http://acupofjacob.com/student_exploration_carbon_cycle_answershhxgh.pdfIn PDF document text
    • http://ersoil.fun/dolovufumazfap4y.pdfIn PDF document text
    • http://fringigejy.site/bass_guitar_notes_for_beginnersg5x4a.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/ijiugc3/grid_autosport_graphics_mod_android.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/pggLhf0/shining_force_classics_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_60163334b2a3e.pdfIn PDF document text
    • https://cdn.sqhk.co/lakodatoli/ihgfbib/demolition_derby_near_me_2020_uk.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/watexixuzojeruw_xirujep_pozozowetoxuguw_likiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/faniza.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/bahama_breeze_nutrition_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/bomberman_snes_rom_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/works_cited_mla_format_examples_internet_sources.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 5364 bytes
SHA-256: 38a05abc05559b3dc12b1c0a76a92595a6c48394abef12c1231cdd3428149e7a
font_01_sfnt_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10712 bytes
SHA-256: 8301384bd0b03f30bf1b3dabb1cba5ba68ab1a41a05d5c2c48aa7fd2d64a27e3

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