Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9622fff3a87b89a…

MALICIOUS

PDF

70.0 KB Created: 2021-02-10 01:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 41a296ad7f85019d71441eb1bfb1209c SHA-1: bc614f0768750f612849bd2aa3983e6c35ad5aea SHA-256: d9622fff3a87b89add1b5084e8712315a433cf6c70cca1289781e2cc1f733650
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

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://seumenha.ru/aws?utm_term=doyles+guide+family+law PDF link annotation
    • http://mon-cmb.best/xofusizakosodawofi2mt2j.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/negamidoxidina.pdfIn PDF document text
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/979d9f6.pdfIn PDF document text
    • https://lomurawejajiku.weebly.com/uploads/1/3/4/7/134732321/4201004.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/nevisagapijanejatan.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/Xge6pid/15361919300.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/jhehjhe/xefiwazawopef.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/hcihdhb/81802109967.pdfIn PDF document text
    • http://swiss-gear.shop/84258048116juvpl.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/fatolarifitez-sudiwinax.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/cNidEfa/47010376493.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/nizidezarirozoxa.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/nefomojuwet/dr_martens_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/override_getview_arrayadapter_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/joxemawumuzobenuvosukizub.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/perozolizemagutuju.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 5324 bytes
SHA-256: 225575b188ebe86ac2b4b0554abfd2f3be3a253337a1789f2de76b409ccfa13a
font_01_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 9612 bytes
SHA-256: de8f8e153648dcb5c4a1a0ae22e5ffc553fdeab892ee471eeb49d332432d6b7b

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