Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13be60923173301…

MALICIOUS

PDF

77.5 KB Created: 2021-03-06 20:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05e78dabd4a1d3551c3a46072b53db3a SHA-1: 1cdb301687e60233b670f57a465abef058b9f5c3 SHA-256: e13be609231733014b4c8a9c32b41e1625730571c0004ff78d8979858e37a8d9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to 'bologen.ru' and disguised with a search term related to a popular song, suggesting a phishing or malware distribution lure. The PDF structure itself is also flagged as a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/strik?utm_term=earned+it+%2528from+the+fifty+shades+of+grey+soundtrack%2529+the+weeknd+mp3+download PDF link annotation
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/firejup.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/kototeladategu-sulabazodulito-xomaloradixid-lekekozorojiv.pdfIn PDF document text
    • http://mawidoxejonej.iblogger.org/articles_of_confederation_vs_constitution_worksheet.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/73387641485.pdfIn PDF document text
    • https://ruputosara.weebly.com/uploads/1/3/4/4/134456906/zuniwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fd9303cc9db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_60209cdcd5266.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/jekutubis_nuvonifiritifa_fekomifivexaxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5ffc793da055f.pdfIn PDF document text
    • https://jabesukugadipo.weebly.com/uploads/1/3/2/8/132814964/3075562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fd8367a080f4.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/sawabomunepudajoxuromotoj.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/the_birds_and_the_bees_please_song.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/blinkist_premium_apk_cracked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fe27744e7c0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_c359f7b3fb9a4b7fa13ff705ebe7fdea.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_92ceb157d4534bcdb59afc3342b84f8a.pdf?index=trueIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_87cc83d414a44807b2d3a8487e69b6c5.pdf?index=trueIn PDF document text
    • http://derisewex.epizy.com/dagagasezemusupa.pdfIn PDF document text
    • http://tiriburud.rf.gd/cg_police_si_syllabus_2017.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_378ed838b43544d8bf2c703ab4b4ada4.pdf?index=trueIn PDF document text
    • http://puteruwegadijem.epizy.com/how_to_make_a_logic_model.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 6100 bytes
SHA-256: c6c9f7b96417df0e7413884de5ef07fadd253895d0e74c5b5b9e6e16c02b953e
font_01_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 11304 bytes
SHA-256: 41a4ad6deeb600f338a7d7e68101791006ac4d0224dde58276ac565f6df57765
font_02_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d