Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8cfbaea97f094f6…

MALICIOUS

PDF

73.3 KB Created: 2021-01-19 00:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 371702213b7addd2295758a482801c4f SHA-1: ddcb574a717e7aa79ab64cbfba9c76cbf960c56d SHA-256: b8cfbaea97f094f6ec775ca710b7e4c27cdba4888c166d422eff5ad87bf0df41
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=frontline%20attack%20war%20over%20europe%20steam PDF link annotation
    • https://dilemawusufugo.weebly.com/uploads/1/3/0/8/130874642/kuzipudido.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/fx4gder/logo_maker_logo_design_generator_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/ghf3mhg/30668002698.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/atjetOq/ball_blast_level_200.pdfIn PDF document text
    • http://bepevekebezupu.22web.org/72745265704.pdfIn PDF document text
    • https://jowopuvuramikir.weebly.com/uploads/1/3/5/3/135313070/pejuter.pdfIn PDF document text
    • https://site-1251335.mozfiles.com/files/1251335/19224716446.pdfIn PDF document text
    • https://site-1178208.mozfiles.com/files/1178208/tumexa.pdfIn PDF document text
    • https://panemomozig.weebly.com/uploads/1/3/4/5/134503052/rawigitu.pdfIn PDF document text
    • http://sozetil.66ghz.com/90654188941.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/eidQiid/license_plate_search_florida_dmv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimugerumu.rf.gd/korean_face_sheet_mask_review.pdfIn PDF document text
    • http://kuxomexepus.epizy.com/gojigavikagomevituburomez.pdfIn PDF document text
    • http://gojaxuga.epizy.com/75682935589.pdfIn PDF document text
    • http://besipopi.epizy.com/battlefield_1943_pc_iso.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_off0000decf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 5252 bytes
SHA-256: 92ef4802ae16dfa0ae86fad8fb4cff7beb2d2809279939d7c6cbe27f6b43cdc8
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 12048 bytes
SHA-256: 5d213d385a71fc6b6969cac2b5f6f718a8544ce7acf9517836ffbc176bb04adc