Malicious PDF — malware analysis report

Static analysis result for SHA-256 4639c395f2ba896e…

MALICIOUS

PDF

74.7 KB Created: 2021-03-22 05:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d702b8727e081e91786f012388d73c59 SHA-1: 753823cb13db23829ecd414caf874aa314ce96a8 SHA-256: 4639c395f2ba896e4ffaca5a403361fdeade9c7ee30b85d700173f68c5af8e97
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'xezojet.ru', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a malicious document designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=betrayal+in+the+city+book+pdf
    • https://cdn-cms.f-static.net/uploads/4481509/normal_60225cf4de4c4.pdf
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5fff9429a4382.pdf
    • https://cdn-cms.f-static.net/uploads/4387582/normal_6034cbda51ca3.pdf
    • http://fekevopimibun.sportsontheweb.net/vepumesawamabalupavu.pdf
    • http://joweponula.mywebcommunity.org/administracion_de_medicamentos_via_intramuscular_fundamento.pdf
    • https://cdn-cms.f-static.net/uploads/4482218/normal_603bea9ef0b56.pdf
    • https://cdn-cms.f-static.net/uploads/4445745/normal_6027e49f9ab38.pdf
    • https://cdn-cms.f-static.net/uploads/4386365/normal_6019ca6195b03.pdf
    • http://tebapewulodafe.getenjoyment.net/belorawibejowumepogarilop.pdf
    • http://rixujewo.getenjoyment.net/xogurudososibotuxemum.pdf
    • https://static.s123-cdn-static.com/uploads/4453098/normal_5ff97e7ca4543.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_40179cc575c444b7ae5b2854a5f17214.pdf?index=true
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_b06c38a8c8d84d628fccd07f0083486c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/259ceb3e-bdf8-462e-953b-21e4b593fc64/from_caligari_to_hitler.pdf
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_b09a637d88164161a87b221d92b7daa2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d681009-7a7b-405b-95c8-aacafed0d048/salefuzuk.pdf
    • https://uploads.strikinglycdn.com/files/689761b4-7437-4b35-9362-c54c13f9f2ff/bajotenuse.pdf
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_ca30f20c72c54070a1141d5aa823ee00.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d94a7c66-3ca9-4d13-80f6-ac106e6cf8cf/jiwozufiwejivupavibuzov.pdf
    • http://naxesabefadufu.atwebpages.com/44th_amendment_act.pdf
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_83a6f06da69e418faf3e4f9c9926e7ec.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e688.bin
d8434fa41ddf0d9f3e45ffa4b1b99ac51c107de48bc8ac86cd5b203cd07f6cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 5420 bytes
font_01_sfnt_off0000f8f3.bin
12b60b1e01772c1d3109da046ecc899a618f05676608c28f7c0de28fdfaeb09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 10764 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.