Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac20de9c26d5017a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-19 19:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 344761fd12c139f4be8ac0d44663a885 SHA-1: da10e09976beb5a4d3c9ffb26cb59344b31ee703 SHA-256: ac20de9c26d5017a66696647d01b8cb76409958b3b49b82086494c606d7ff1da
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or conduct phishing. The document's structure and numerous links indicate an attempt to direct users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=mr.+coffee+iced+tea+maker+owner%2527s+manual PDF link annotation
    • http://rotiwopofeze.mywebcommunity.org/budgeting_101_michele_cagan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_602a7a4ab5ef5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378393/normal_5fff6a0743de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_603261860854a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5fd629981dae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_6014d1ba1d9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_602e1b48d58db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_603c760437245.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
    • http://dedapudebofeje.rf.gd/bipap_a40_brochure.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_408e770049944699b2a837e436bc1bba.pdf?index=trueIn PDF document text
    • http://najorenowodume.epizy.com/30289446246.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_61f41534513941fc9f2d7235d93dce51.pdf?index=trueIn PDF document text
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_0472392d3e74423fa21a32246698a0b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/246754f3-777c-42e1-ac96-74be8e726a23/godugil.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/biological_and_cultural_factors_in_human_evolution.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_647c4712e10348d195a2961774489cff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb45608a-1323-4e2f-b316-f15204e5d809/senores_del_narco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7993671-6156-41f2-99c2-828c3829632e/how_to_solve_2x2_rubiks_cube_in_2_moves.pdfIn PDF document text
    • http://besinaxot.epizy.com/49922560894.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/caia_level_2_workbook.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/kuvimexunetunariloze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5060e1e3-0d7a-42e9-a37c-b4e0c3b4beb9/36819187769.pdfIn PDF document text
    • http://zulorokufejepa.rf.gd/74645833158.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 5276 bytes
SHA-256: 4fad528b70e8f050c5617fca97eb87e4aa845c9733a8406e3e94b875b1f64665
font_01_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 10940 bytes
SHA-256: 30c32b3ef0f6e87c9997c2583b7c1392bb5213fea0f1003475c761389b3f4062
font_02_sfnt_off00013346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13346 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361