Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47edbf99a197d0b…

MALICIOUS

PDF

75.1 KB Created: 2021-02-11 04:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 11ab644c1a990bec1bae1a2e210eab04 SHA-1: 18265d479ffe9f31b369b6783713ce2534d0669a SHA-256: d47edbf99a197d0bf6239ff195890376fd134144e1b656ee1fbfaaa339e7c3cd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://seumenha.ru/123?utm_term=4th+and+goal+2014+unblocked PDF link annotation
    • http://musc-media.xyz/vawitefafekosefiguvas84.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/b0fc98d09db9.pdfIn PDF document text
    • http://chambrely.xyz/82543502002idby2.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/fila_disruptor_2_platform_black.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/behen_hogi_teri_movie_video.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/c8c47a78a.pdfIn PDF document text
    • https://nurowilalivep.weebly.com/uploads/1/3/1/3/131380447/cbc52866e0d13e.pdfIn PDF document text
    • http://biweekamnf.com/ed_sheeran_zip_downloadscao1.pdfIn PDF document text
    • http://selectgetc.top/ball_shooting_toy_gunh3ghd.pdfIn PDF document text
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/4425771.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/40ef55e9.pdfIn PDF document text
    • http://womenita.fun/livazukasilepadubevigo7gul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukopura.rf.gd/28844177464.pdfIn PDF document text
    • http://punolubumima.epizy.com/birth_plan_template_nsw.pdfIn PDF document text
    • http://xitevesapa.epizy.com/dilogasiguj.pdfIn PDF document text
    • http://xijotat.rf.gd/seresusegitifuma.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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 5448 bytes
SHA-256: 41be54358e78d887f85b6b94ca69dd615b0ec83cf6974d6f5af102cc4e0a43d3
font_01_sfnt_off0000fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 10408 bytes
SHA-256: b798547f1283ffb592c01d54d8ece29d37bc4bc193c81aea08b699f13b1cb7e4

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