Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3c60ede800d55f…

MALICIOUS

PDF

66.5 KB Created: 2021-03-03 04:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0674ef4318407f55914e937c7311816c SHA-1: 2348a0d798ac5fa2bdd424e36233cedf9c514739 SHA-256: 3e3c60ede800d55f4c5f201104fda39afaea79483695a72dc171fb7d85d6f25c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs, including one pointing to 'bologen.ru', suggests a potential for downloading further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=etec+tv+remote+control+codes PDF link annotation
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/totazewo-gunekugemenu-naleweni.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/09185b8.pdfIn PDF document text
    • http://lamovingcompany.com/pagilijogine7tdv.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/ruzujerofuv-bukivoruvanos-bujewafako.pdfIn PDF document text
    • http://bigowet.xyz/linear_algebra_for_iit_jam_mathematics1k97n.pdfIn PDF document text
    • http://kernig.store/todazaz55ad5.pdfIn PDF document text
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/nokeg-xelobufup-konamigowibog-muxejemad.pdfIn PDF document text
    • https://jeboxuxu.weebly.com/uploads/1/3/2/7/132710743/wixalatenasawexed.pdfIn PDF document text
    • https://lolivifi.weebly.com/uploads/1/3/0/7/130739590/joluvunomidav_bufikare.pdfIn PDF document text
    • http://my-credit.info/pioneer_avh-270bt_installation_manualugta3.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/rixevozajixezos/26896590743.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/86549225317.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/adelle_basic_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/67825910217.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/asymptotic_notation_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/mubetukajarawiruwudanu.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/zupazuguz.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_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 4892 bytes
SHA-256: 939063f3787ccded189878914f4d50b342fb19d83b4243688be776f5b65eacea
font_01_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 10268 bytes
SHA-256: 1cc3152f80704c8174128667e3ae4d9a4b85330bff28567310dc89800d20e07c

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