Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab080ddf61c341cb…

MALICIOUS

PDF

87.0 KB Created: 2021-03-22 19:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2c43d52601bb66ee6ea0e01307db876d SHA-1: 9cc7eba323f61ebf01df678b70453a9e95ec7052 SHA-256: ab080ddf61c341cb085fadd248224ab865c278842cee3625b8e9f734d203907a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('botokaw.ru') that is likely used for phishing or to serve further malicious content. The presence of multiple links on disposable hosting also suggests a link farm designed to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=american+gods+season+2+episode+1+recap+ew PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422918/normal_60069bce24740.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/jojegcQ/drill_master_trim_router.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fe73359d899a.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/igvheXI/guwuvezuwep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_601c859b84e28.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/gheSrUx/outdoor_survival_knife_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/PHhbpOJ/hello_neighbor_act_3_house_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/iduiivf/85829605884.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/gbDhcgg/redcon_pre_workout_uk.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/23390638306.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/hbtCljh/muwubatevad.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/r70jgcG/observation_and_inference_worksheet_for_grade_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_603a61b48817d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_6006aa052d050.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/LjfBgf4/2228290669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_6003e3fe59637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_604a9b877a620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutaxinasiva.epizy.com/comdial_phone_label_template.pdfIn PDF document text
    • http://fejusudoboriduf.rf.gd/63170826449.pdfIn PDF document text
    • http://zuleturibalege.rf.gd/zazevabumomaru.pdfIn PDF document text
    • http://wesukaxibofawu.epizy.com/5384292018.pdfIn PDF document text
    • http://xinotitatidab.rf.gd/79617173201.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 5624 bytes
SHA-256: 8982b13d585bc50712d94155552d0b51c7b5c03bde4c67ac0a4f44b81f71dad1
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 2352 bytes
SHA-256: 701d588890bb39d047d71dbce80dab23f10c5b8c95a8d9824e5e49a885c8f8b7
font_02_sfnt_off00010ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF9 12260 bytes
SHA-256: 99da668d1283977d7d54741c1f8cf3ba3345b5c8f9ff978962e7bbc9fe861d49
font_03_sfnt_off0001382b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382B 16352 bytes
SHA-256: d5c1d73facc1ee30369663d5bc9e1d56b1b6bad2d1eb0652642bc5daa7bdf87b