Malicious PDF — malware analysis report

Static analysis result for SHA-256 806f591cc52fd096…

MALICIOUS

PDF

80.3 KB Created: 2021-02-20 09:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 81f7866e9ade9021eeaf55e53a9b8acc SHA-1: da3c606f5405858cd159b2116f00cac6f74b8369 SHA-256: 806f591cc52fd09623e4c22ab0edd8d48e582e633ee230dd7dbc84f86cbfccc3
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=mex-n5000bt+service+manual', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution scheme.

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://maypoin.ru/wix?keyword=mex-n5000bt+service+manual PDF link annotation
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/sepixuvufasef.pdfIn PDF document text
    • http://zamividiwido.22web.org/59560065585.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/fudode.pdfIn PDF document text
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/lopubaxelozojebabag.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/loseteti_fuxuzogifu.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/manotokaxap_terolevumob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_601cc07701e27.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/91c758a.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/tulumarixevirakutuwaluko.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/dabilinuz.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/2d77df12283.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/3196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_600bf1d344c37.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petilawunabebi.epizy.com/moraxella_catarrhalis_treatment_guidelines.pdfIn PDF document text
    • http://wonavoka.epizy.com/roku_2_xd_still_supported.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/63838141932.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/upsc_mathematics_optional_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/bezufe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 1684 bytes
SHA-256: 3be171f85ad8f1702deb1f4d94cdea91689bb44ac529ffc8275d9ea726f877ea
font_01_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 5516 bytes
SHA-256: db13148433356383c11354e8fa140d154e472dcec59ec28e49fcddd3e54908da
font_02_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 14692 bytes
SHA-256: 262fe41e8e5050d0fcc0bfff195cd16fae3d02583ae1125db0f91c4c6de32abe

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