Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0ca2886068f1b5…

MALICIOUS

PDF

83.5 KB Created: 2021-03-28 00:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a057a5e7e6a1f0b77a7957c09fea769 SHA-1: 1161e15255904d574c0b1cc3dd48153838ac222d SHA-256: 5e0ca2886068f1b52edc5f13836f1b32610d3da6c2c7075f51a8682358657f8c
186 Risk Score

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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=how+much+do+security+jobs+pay PDF link annotation
    • https://cdn.sqhk.co/liregevo/iggahiK/xerubodarux.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/asfixia_mecanica_por_sofocacion.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/refawuwibewepujoxilope.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/fadomubewilivu_kesunovesudez.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/giAicha/ghost_rider_3d_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zewawugawa/jXigghf/nanebidakifazaroromituzil.pdfIn PDF document text
    • http://senaxemuj.iblogger.org/tedatupukulawo.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/PTiaqid/30_day_weight_loss_meal_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/z7kgcic/parent_teacher_meeting_minutes_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/jftIhaD/top_hypercars_2020.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/8041158.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/asus_q551l_battery_life.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_68dbca1e12c945e0a425b8a37bca6844.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_dd535960a9d64984b876eac58192cc4f.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_do_i_factory_reset_my_portal.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/47829729607.pdfIn PDF document text
    • http://natodik.epizy.com/72123521583.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 5428 bytes
SHA-256: d6c6e159646e028bdf23a03487a5f0ea1fa50c1a6fe995df6e7b31c9da4dd10d
font_01_sfnt_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 11176 bytes
SHA-256: e9ea7cbe4ff75a6e9a1b1d7630ada8622f86a60a00fc72225264aaefc43faab3
font_02_sfnt_off00013326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13326 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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