Malicious PDF — malware analysis report

Static analysis result for SHA-256 9291abe246f7894b…

MALICIOUS

PDF

73.6 KB Created: 2021-03-18 15:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ea4ed7178c45539c874eebbc1fe80e36 SHA-1: a66c659451729eed6414928224fed0ab111c53ce SHA-256: 9291abe246f7894bbad0c070577efa49a91cb347be4c5cc1042fc309c69a633a
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to manipulate search engine results or redirect users to malicious content, potentially as part of a phishing campaign.

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://bologen.ru/wix?keyword=larry+richards+smart+guide+to+the+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367005/normal_604d6ab3c8598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_60513ed1c8cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fe8f26f00ac4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447270/normal_5fc8639a59726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_60176d0c89c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_60483148ea060.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/mipeboro/angry_birds_java_mobile_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/game_loop_error_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/guzejuxunotodaxavuto.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_8fdfe0564e9f404dae0201eafa069825.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/69783390324.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/welarog.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/premiere_gymnopedie_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/rhoma_irama_begadang_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb522f5-795d-4804-8906-fb6a1a11fdb6/what_is_the_difference_between_nevertheless_and_however.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/xodusemudobete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa1511c1-41a4-4b36-8e86-02e2c1afe9a2/jazukenofekonitofival.pdfIn PDF document text
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_f7f58b7a69274bbc9f955ccfe0f068f8.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_63233c6849324c339e2afdce5cf87833.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_bf4094b38b084394a2403f2af1eadebc.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_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 5536 bytes
SHA-256: 49b268eb6cf2e1710f906877e4eb6aa179f7b8086c33c6a90d20d2c1745093a7
font_01_sfnt_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 10744 bytes
SHA-256: ad582e5a1878a1e8ab89555c74ae6e8acecc207f44bed1762dced3d43649b9aa

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