Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a11e19cb5d5a99…

MALICIOUS

PDF

81.3 KB Created: 2021-03-02 00:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f535bfe779c7f9254f04a4f0f397dcb7 SHA-1: d739136f564d16b18ab54d221d5df8fe98e3661a SHA-256: f2a11e19cb5d5a99b622bb6932fcd023a7d14e007c32c2d8488857f5a27cdc9f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be related to a 'Whirlpool dishwasher manual', a common lure for SEO-based phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=whirlpool+dishwasher+manual+wdf520padm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489969/normal_5fe63d0d5594d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5fec052185128.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/nefusadu_givarazujeb.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/56162701445.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/goxaribefoloki.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/8c3e9ea1181ec4.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/4cNj5jd/64937653321.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/156175.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/Kibd9gc/2262659119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fdda7c20ae6f.pdfIn PDF document text
    • https://suzonozumevudem.weebly.com/uploads/1/3/1/3/131379217/6530236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372719/normal_5fce50ad18a13.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/eFhcigl/soxizaki.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/tinedi_kowuwelomixur_xaguwu_wabezewomaguma.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/tukitizet.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/jguibgi/97130125463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ffc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 5784 bytes
SHA-256: 606d5bd04d139f5973a97fa21c0524b5aaa910dc56be03f54b710b26c99b9cf0
font_01_sfnt_off0001136c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136C 10640 bytes
SHA-256: 4fb4ac594aa25bed27e661679b3f1ae57909bf19a4bb38a259e97306d3ab93c3

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