Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a5a43ffc5c656d…

MALICIOUS

PDF

77.1 KB Created: 2021-03-05 04:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 87691dad24ab9c14073c569212d5e6a2 SHA-1: 5ac5538fa5d57aabae7ff3f603d6293ffe794bc5 SHA-256: e8a5a43ffc5c656da45b59586f767d0429ddb30b85b3cfc7b225b937dac0e713
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and likely a phishing or link farm lure. It contains numerous external links, many hosted on disposable domains, designed to redirect users to other sites. The document body, though heavily obfuscated, appears to be a deceptive lure related to search terms, suggesting an attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=old+school+hip+hop+songs+with+good+bass PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/Wgf5jct/ps_vita_reality_fighters.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/ifnnLIv/47618788992.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/gjjcijB/fodawefemutejoxoxumebed.pdfIn PDF document text
    • http://dorightunion.com/xuxuwimonuroph54k7.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/ihgishj/chat_virtual_dian.pdfIn PDF document text
    • http://blog-millionaire.buzz/28105832340cfsyk.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/maslach_burnout_inventory_franais_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/tjbYifF/53931323969.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hsgfjc8/daiwa_double_clutch_lures_bcf.pdfIn PDF document text
    • http://lifeit.pro/ddp_yoga_workout_schedule_beginneru7e7f.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/ichjbSp/pejisefa.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/webasto_bunk_heater_repair.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/mjigeQ1/call_of_duty_warzone_download_for_android_free.pdfIn PDF document text
    • http://shoop-fm.ru/rijovesap7rsop.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/ahaiajb/fedosibetigiwifodizofiguw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_6a520068ffc54c5883ea8d34ba44c3a7.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_c6aa53715f0f448ab88fa30e5d8aad1b.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_31985d4d8f6b434bb5105fa02ef2127c.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_35154964b961432b824315e9d1e12781.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_1bebdfc543a54144b0643cefb20bcd59.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_b8c0ebe6dd0f42eaad3ceb0fd0db10c9.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_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 5500 bytes
SHA-256: 5370f171b1b55495d19796ec8ae8cbda0e57f5e3d9d6081b3e8eff7620d09a58
font_01_sfnt_off000100fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 11416 bytes
SHA-256: 30b3ab197a238119403aaa99e5478be2fca1dddbb01540d865c75104706545b0