Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9d82ee1c7f1796…

MALICIOUS

PDF

81.7 KB Created: 2021-04-02 05:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d56c58d3670958bea34f362936c7f6 SHA-1: 247aa5ccaa1c008605fae10c149ea77fa4150c04 SHA-256: 2c9d82ee1c7f179659f812401040faba8dab169ab8d1d87984af89b2edcafa16
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://ponafet.ru/wix?keyword=what+does+dws+mean+in+dutch', suggests a lure based on a common search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=what+does+dws+mean+in+dutch
    • http://xejopegig.mypressonline.com/architecture_n_tiers.pdf
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/nufofimotenavigaki.pdf
    • https://vepoxiwoja.weebly.com/uploads/1/3/1/1/131164136/feralula-fevon-tewuvobavi-kogelijisajul.pdf
    • https://kunubukom.weebly.com/uploads/1/3/4/5/134599245/giburufema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fe7a3a9a-6fdc-48d4-8940-76bc8a6be1ca/veleburonosupaloxo.pdf
    • https://uploads.strikinglycdn.com/files/e6f4b3cd-1367-43d4-8be6-1f8ab30c2f24/36654042292.pdf
    • https://s3.amazonaws.com/kelageketisefuv/angelina_jolie_maleficent_transformation.pdf
    • https://uploads.strikinglycdn.com/files/3879b911-fe75-40f7-b8eb-d76ddc474e91/what_is_included_in_osha_10_training.pdf
    • https://s3.amazonaws.com/fidefofudi/the_monkey_king_movie_cast.pdf
    • https://uploads.strikinglycdn.com/files/7bcb9de0-37c3-4711-8df6-53310544aa58/75692816397.pdf
    • https://uploads.strikinglycdn.com/files/4ce3d1a5-7d4e-4161-9dbe-13df93c34efa/cfa_level_1_minimum_passing_score.pdf
    • https://uploads.strikinglycdn.com/files/0ca7c559-2fa3-4940-903c-7b5566018d59/9665777910.pdf
    • https://s3.amazonaws.com/bokofapig/86491165433.pdf
    • https://s3.amazonaws.com/davolazupivowi/34606665589.pdf
    • https://uploads.strikinglycdn.com/files/a3739741-c55a-48a8-8cfa-c817c62d9afd/preface_to_lyrical_ballads_1802.pdf
    • http://bidajalej.onlinewebshop.net/30164079733.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/polycom_android_app.pdf
    • http://dovunufesesiz.onlinewebshop.net/vazufazipepasapu.pdf
    • 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_off0001033e.bin
1f260bd85a1c072e856e2009272b3cbc20e79d9c44efba3d0b6dbecd43e698d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1033E 5156 bytes
font_01_sfnt_off000114ba.bin
02513f471f10d4aca5ee6c6bc539811a84da3bfb048d2edfffdc900f429d6715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BA 10536 bytes

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