Malicious PDF — malware analysis report

Static analysis result for SHA-256 5397bee7766c4a65…

MALICIOUS

PDF

79.4 KB Created: 2021-03-29 00:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bfc2b0dccc428b354ce8a8823bb8c518 SHA-1: 46bcccded282d63bfb67ebd9108049e6d324c94e SHA-256: 5397bee7766c4a65b79599b3aba3644b65396bdb6ffa9bf9523c368e8493c11d
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external URIs, with a prominent one pointing to 'https://maypoin.ru/123?utm_term=de+che+aoe+ban+chuan', suggesting the document's primary purpose is to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm hosted on disposable domains.

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 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/123?utm_term=de+che+aoe+ban+chuan PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ffbd703adf6c.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/jomriaO/adithya_dubsmash_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fd64a9451835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fe9eb520130c.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/az0rifU/15166404429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385613/normal_5fe1fd0d34ad7.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/kadotirejofunomebosoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/jcbjggf/toputal.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/problemas_sociales_en_el_adulto_mayor.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/murim_neworimupeji.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/jazimapa-rewiluleji.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/5433766.pdfIn PDF document text
    • https://mamasikixatok.weebly.com/uploads/1/3/5/9/135961158/lavowaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_605891c9d9f1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_601146c7bbf9b.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/jhjhajb/pitbull_dog_names_in_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_a56359abd27d420590693666ad77f01d.pdf?index=trueIn PDF document text
    • http://noroved.myartsonline.com/89235489121.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_209d12f043ba4f72858dc86e5230d58e.pdf?index=trueIn 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 4720 bytes
SHA-256: 1479029beca6b025892435a6ba8be20a568f44c460289d6e3dc092b3cd03d514
font_01_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 23292 bytes
SHA-256: fa1484aa2412b14339135f192ffced03bd908cd3a02506cd424c3ea4fbeff3b3

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