Malicious PDF — malware analysis report

Static analysis result for SHA-256 29871b056f1f8c16…

MALICIOUS

PDF

72.2 KB Created: 2021-02-23 08:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4a2639e3e5ad7823ab80eed8833cfcbd SHA-1: 6e1f591af48d1dd61225544e665a91fa7a1822ef SHA-256: 29871b056f1f8c16ee2e2aec23d5ae6070a00705b603fb4b0213ab2dc58509b8
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://baarspo.ru/wix?keyword=ied+activity+3.5+applied+statistics+answers PDF link annotation
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/nomefod.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/oHQ9Sgj/download_game_drag_battle_racing_mod_unlimited_money.pdfIn PDF document text
    • http://nout-prokat.website/danza_clasicalawls.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/e73d4a56.pdfIn PDF document text
    • https://kibopomirisusi.weebly.com/uploads/1/3/2/7/132741064/20705d282f5ad1.pdfIn PDF document text
    • https://norotenivepele.weebly.com/uploads/1/3/4/0/134042349/9c2b39832.pdfIn PDF document text
    • http://chambrehub.xyz/pabivitutiwikid393.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/59603142444.pdfIn PDF document text
    • http://shopmzm.site/coefficient_of_performance_calculator6cge4.pdfIn PDF document text
    • https://vuloxeresipagig.weebly.com/uploads/1/3/1/0/131070754/nodezoweboz.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/mujevubutukoxu/google_sheets_vs_excel_2019.pdfIn PDF document text
    • http://wozetarep.rf.gd/47616308895.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/bepinej.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/29285536441.pdfIn PDF document text
    • http://ravuxigud.epizy.com/45497421741.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_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 5576 bytes
SHA-256: bef620b370f9ebe8a626b62da2a1aba027650f65e4c685771323d4094e031be3
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 10980 bytes
SHA-256: 122344962ca7b05834f081f38334a646408c4d2b6242788e36bbc6a40096a473