Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0032168c06b906a…

MALICIOUS

PDF

81.1 KB Created: 2021-05-22 13:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b1699daaf8621664026110058b0e4fc SHA-1: e0b10175be25a76977ee9b18de510cc6050cf7c3 SHA-256: b0032168c06b906a29860bc51a96f6638bea06f2b92cc39d5572495ddad3bd1a
186 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous external URIs, with a primary suspicious URL pointing to 'jumiwimov.ru'. The PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

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://jumiwimov.ru/strik?utm_term=proceso+de+elaboracion+de+tortillas+de+maiz PDF link annotation
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/bilugawoxabumelon.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/ligofa.pdfIn PDF document text
    • https://sonenekuz.weebly.com/uploads/1/3/5/3/135302947/bd775.pdfIn PDF document text
    • https://pabojigu.weebly.com/uploads/1/3/4/8/134862721/gogurukaxewe.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/7209625.pdfIn PDF document text
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/supizaxirifatezajevu.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/80cf3187.pdfIn PDF document text
    • https://bomupafevusoze.weebly.com/uploads/1/3/1/4/131407549/vurowejuparuzadu.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/radetuki_pitoxogono_mofuzo_bodibudanobarug.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/f605f8ca50b167.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/bovefurezuda.pdfIn PDF document text
    • https://wiluxuvofox.weebly.com/uploads/1/3/0/9/130969019/e76fa.pdfIn PDF document text
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/6142931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/977f235c-3a91-4d88-bb03-72c679f97b0b/what_do_you_do_when_you_are_miserable_in_your_marriage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56591b0-3fd2-4525-b096-b1c2a6a7c8b3/teaching_by_principles_douglas_brown_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6ecdd6-2a4c-4a7b-91f5-44df2a71f1fa/79638550454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a9fe91-4d11-4afc-81d5-6a3087a741b1/39727211473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c9e22c-2f18-49c4-9d17-a696176559cd/rusa_dilbilgisi_susanna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a37861-bd35-4fd8-a1ca-d203dbd7c868/nuvapuzomofibomodopapag.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_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 5276 bytes
SHA-256: 2b04387cab3049245b7f87e9c7752c5ee071c23e7d28897b505c8ec1ffe710e4
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 11868 bytes
SHA-256: 09f8a20b8ee8c7ca73f94283a2f0a2a7c36e265d24f491f2c2776c7d65910b74

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