Malicious PDF — malware analysis report

Static analysis result for SHA-256 043d695da98baa25…

MALICIOUS

PDF

70.0 KB Created: 2021-02-14 19:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 720b1cbd7f9ffa80ace1b7998dbe3d09 SHA-1: 93ad486df9fed16e78b5be61c5ed4b5702f28931 SHA-256: 043d695da98baa2576fb1214ec64f29d245173e73c97c16919c500b3b707eae1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=object+oriented+programming+viva+questions+and+answers+pdf PDF link annotation
    • https://loribipusav.weebly.com/uploads/1/3/1/3/131379532/988410.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/130838.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/ihgFQij/cbse_board_class_9_english_book.pdfIn PDF document text
    • http://eu-study.ru/bangsamoro_basic_lawiq0md.pdfIn PDF document text
    • https://bumovewadenol.weebly.com/uploads/1/3/5/3/135318567/ludosejatexo.pdfIn PDF document text
    • http://optalpha.com/213419991871jvl6.pdfIn PDF document text
    • http://usesalon.xyz/97786672430ipq2h.pdfIn PDF document text
    • https://xebanodax.weebly.com/uploads/1/3/5/3/135382800/a006a1713.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/dded8.pdfIn PDF document text
    • http://nerixobetevo.iblogger.org/conformational_isomers_example_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gunexukod.epizy.com/falcons_injury_report.pdfIn PDF document text
    • http://poziluxolebulu.epizy.com/ring_size_guide_mens.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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 5964 bytes
SHA-256: a285ffc1510eb1aff0db36940152c931ee921c6d0accdcc6c191c0c6b7b8ea5c
font_01_sfnt_off0000e7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 10196 bytes
SHA-256: 06d5e309c1317b6758d68255c423d5e2f5eff18180f7247faeb408ac1325ec51