Malicious PDF — malware analysis report

Static analysis result for SHA-256 a614715a6e7809f2…

MALICIOUS

PDF

68.4 KB Created: 2021-03-20 18:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b081ca98dea41bb6b0960836a5d844fe SHA-1: 174e38da2a7cbb7a88a8375223ef11a5c8dac662 SHA-256: a614715a6e7809f2acf5cbb4b92e2c281fa512efca07b30524cc1ab628932d43
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary malicious URL being https://maypoin.ru/wix?keyword=prime+time+3+book+answers. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=prime+time+3+book+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389095/normal_604e7da0e3d8e.pdfIn PDF document text
    • http://zesodibisejana.iblogger.org/nifigujukima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5fe1a3043752f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_601a7ea55b045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5fe6d26983c0a.pdfIn PDF document text
    • http://tesuzaro.22web.org/74537199459.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/kegovev/62956567799.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_fd0c35f8a53f44fab1604cd9e27e588c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goneduzum/guided_reading_level_j_chapter_books.pdfIn PDF document text
    • http://vazuxonedadid.epizy.com/38872448566.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_80e50ca540a246538d0bebb8de890c5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/faux_leather_sheets_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912fa5a8-f1bb-4140-b1db-93bde9f9ceb7/how_old_is_paige_spiranac.pdfIn PDF document text
    • http://fepobetef.rf.gd/adobe_after_effect_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2aa02d-c1ed-45d2-95b9-17dd34aa0db6/html_and_css_templates_for_beginners.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_9a19a010cec14fcea1e59703b0490ae5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac15b3f5-065c-42ea-b459-a3449a4e3d60/45937421312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7339c82a-68b5-4e8d-b791-c2f1dc9f1733/44850856715.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_23555cd095224f1e8a72dc9d36b0bbe4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd11ca16-768d-4d55-a896-773325dbac29/sugugivinireg.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_beaa22cf54d5459e888e56981b7f1e65.pdf?index=trueIn PDF document text
    • http://bufarudewigufeb.rf.gd/puffin_browser_for_pc_windows_8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 5260 bytes
SHA-256: eedea3243b7f4341daef0ef48ab5e46d6e6720379893676149554bbee37e5315
font_01_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 10028 bytes
SHA-256: 2c32b077042e72d4a9def0c16eecd1cfe48f65f8bf76ea4b1108c6cf5edcc661

Open this report in the interactive analyzer, or submit your own file for analysis.