Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7793ba823058111…

MALICIOUS

PDF

68.0 KB Created: 2021-03-01 00:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0ff6a5bdc59a1514b086980dc738396e SHA-1: 45b0a6d88d283a2e09b830f3ece812d8d841f110 SHA-256: b7793ba8230581119957e0ed66dafc0afc931cd65e6443b8d7930fb463ac6de3
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to generate traffic or distribute further malicious content. The document body, though heavily obfuscated, appears to be a lure related to a strategy guide, which is a common tactic for phishing or malware distribution.

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://ponafet.ru/strik?utm_term=super+mario+64+strategy+guide+book PDF link annotation
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/vufale_deduvabifenovu.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/8266a0a95e8667d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_6001bbac204e7.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/NCiy1hc/doot_doot_defined.pdfIn PDF document text
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/4003008.pdfIn PDF document text
    • https://tisizapotiw.weebly.com/uploads/1/3/0/7/130776245/7149819.pdfIn PDF document text
    • http://medyayazilimtr.com/free_printable_english_worksheets_for_4th_gradersa94lv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_60183af01d864.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/5YhcggV/lamadisetudezezidogukixur.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/popolaf_kolepumed.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/9638247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_603690d4bbc8c.pdfIn PDF document text
    • https://fopaxiguvoxux.weebly.com/uploads/1/3/4/5/134584781/7c5c454deb2f.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/egjzfjd/fogelilapibunop.pdfIn PDF document text
    • https://cdn.sqhk.co/lowimipofevu/ChjpiaL/vifafawejafuvop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_60137bb2cd17a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mofibukuzoke.rf.gd/rovumuzowuwezexetaxob.pdfIn PDF document text
    • http://fetevatakipip.epizy.com/ajuba_full_movie_hd.pdfIn PDF document text
    • http://lefivox.epizy.com/20342506250.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_off0000cd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD33 5900 bytes
SHA-256: 62d73ce1d96b65e5242afce6700cbbda85c6b5f0b5b7dcf1e74168e4c39d8447
font_01_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 9896 bytes
SHA-256: 7e983086fdb03708e76846220f1662a48d62d1fff58368d3aed525ed4e9bc3b1

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