Malicious PDF — malware analysis report

Static analysis result for SHA-256 7508095fdf201559…

MALICIOUS

PDF

75.8 KB Created: 2021-04-10 07:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6fbbb72d269e6af8196b50fe9919b4aa SHA-1: 4eb18e9899bc27f2af95413bcc3c9d4b18765c2f SHA-256: 7508095fdf201559bcb980ae89f8a70d9273607ac519435b14f806e2e3bd01b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to remote control codes, directing users to suspicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=cisco+4742hdc+universal+remote+codes PDF link annotation
    • https://cdn.sqhk.co/tufiroxova/fOmljch/kolovawoxasuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/giifpUw/accounting_ledger_forms_free.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/369fd1fbc77ea73.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/iddcShe/madcar_2-_4_players.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/gfjeOjd/wotimema.pdfIn PDF document text
    • https://gawenowufiwozup.weebly.com/uploads/1/3/1/3/131383543/8764640.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/3267356.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/7512886.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/fekife/telugu_suspense_novels_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/xosugavidunumowodasud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c76c893-45b1-4c07-9e91-190fbe5f3e80/will_there_be_a_season_two_of_alex_rider.pdfIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_62038a2f709244ee8201f1b68bc889a6.pdf?index=trueIn PDF document text
    • https://951e66c5-660f-4748-bfcc-a6cc0831133d.filesusr.com/ugd/4967bb_bd848f13446048c2ab9524c7e7bbec45.pdf?index=trueIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_61c32868186a4a889bb8b7506a1c3ee8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/daddy_s_home_parent_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7cbb5-f377-4508-a13d-a0da5c28d7ee/javafx_for_dummies.pdfIn PDF document text
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_8ac66dd45665413386ecbd2c370ad97c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/zomesulozalap.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/johannes_itten_the_art_of_colour.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_f10109f4b0de44f3a315c4d9b6464a2e.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5444 bytes
SHA-256: 70582f247050e87688a06ea65fd83ad380a8702d710f01cc52cd4200bc5663d2
font_01_sfnt_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 10488 bytes
SHA-256: b88aca81f7dee3a4a8219fa35214b06366b7876052c0ba6de6df822b2ccdd538

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