Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7ca15605fda9d1…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 06:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: efbe213560ff7c56154c2fc6741a8c81 SHA-1: 52e1a680257473416360197c4fddf2dd1f27cea6 SHA-256: 3e7ca15605fda9d164acdb6afbb5a1387578b31e3dd1bcfc023c3a9538af7302
126 Risk Score

Malware Insights

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

The PDF document contains a link to a suspicious domain, fokemale.ru, disguised as a packing list. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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/award?keyword=burning+man+packing+list+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452624/normal_5ff296115f2b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ff5b6a565c0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383572/normal_5fc62cf913e40.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/ihWhhgJ/15978994758.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/Yhgjic4/racing_in_car_3d_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_601fa78be7089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_6015b5e0ee1aa.pdfIn PDF document text
    • http://gesoxusem.iblogger.org/cost_audit_report_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/cGibGdh/megan_thee_stallion_ig_unlocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxepusiz.rf.gd/application_x-_www-_form-_urlencoded_resttemplate_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/stock_market_results_today_tsx.pdfIn PDF document text
    • http://xagewunekewoze.rf.gd/davis_drug_guide_free_app.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_9daa144303ff4843b3110cee161a7a26.pdf?index=trueIn PDF document text
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_5e5ef54f36cc4136a94d439d0b6c7dd8.pdf?index=trueIn PDF document text
    • https://fff5164c-1337-4dca-a870-9ee8129e9d1f.filesusr.com/ugd/11cbe4_f2d87b11ffc64943b80e7b04d04eb94f.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_0c9d63e9badf47c887732f225df44264.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_10b5058d951c47cea5d58ed6fc9279f5.pdf?index=trueIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_4c4ef7f1b42649c48577c986ce5c34e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokudapele/astral_projection_for_dummies.pdfIn PDF document text
    • http://kogusox.epizy.com/16737536064.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/kmsnano_activator_office_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/shia_books_urdu_free.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_3647f6c13ff147a0888947e54e17369f.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_628cb3b86bf741259887d0daf35c0cae.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_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 5588 bytes
SHA-256: 06e5de926e8e09f434e6697fa011774a61f227f4830ee548a46479ad41d94288
font_01_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 11396 bytes
SHA-256: 66b342a1858b74a5c3ce4243fbe4c2fa839c12eea162ecc08ac056ab0b6e396c