Malicious PDF — malware analysis report

Static analysis result for SHA-256 367695efb3fa210a…

MALICIOUS

PDF

66.1 KB Created: 2021-02-18 12:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3c0ede1cb8d955cdac3cb0249e61b2a SHA-1: 9b93c0d447bede4d247f5efe7eb80d9021727a62 SHA-256: 367695efb3fa210a44a4d00fe8e2c277c2488363a62a7eedb293a155d62efd02
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=an+introduction+to+game+theory+martin+j+osborne+solutions PDF link annotation
    • http://hs-life.ru/xezapaxubiputamo8zuhg.pdfIn PDF document text
    • http://mklhhhh.space/venofugatanapedibaxejovmdjc.pdfIn PDF document text
    • http://tcerkovniekupola.space/2235633184indsm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5fdac65bb77e4.pdfIn PDF document text
    • http://getfreecreditreport.info/rakopodukif3121x.pdfIn PDF document text
    • http://effektzhizni.ru/hik_connect_apk_download_for_smart_tv60egt.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/69809444773.pdfIn PDF document text
    • http://detonic-hypertonie.website/conan_exiles_star_metal_locations_mapodhhv.pdfIn PDF document text
    • https://vadutivolojogo.weebly.com/uploads/1/3/0/8/130813650/0ce6fed1a5.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/midofos.pdfIn PDF document text
    • https://gufulesem.weebly.com/uploads/1/3/4/6/134698375/tetowarebub.pdfIn PDF document text
    • http://webdefilmizle.com/wusthof_knife_block_set_salesod6l.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/taguxif/98098343797.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/android_vs_iphone_which_one_is_better.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/last_cloudia_global_reroll_guide.pdfIn PDF document text
    • http://jegajumofi.rf.gd/a._i._artificial_intelligence_movie_free.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_off0000c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 5660 bytes
SHA-256: ba6fd5c6432756e35898d9a04d92942aa202355482c1eb347aa5032e0e3895c3
font_01_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 9668 bytes
SHA-256: 255326b681e7ffee4a8d94860c8f4c5dba55a777e30e255eaaaba851983459b4