Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29e5698f1963f7f…

MALICIOUS

PDF

92.8 KB Created: 2021-03-19 14:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f176c90d817240f028163d50565135 SHA-1: 5f714f3d09b185f59e5c2452e5b5f4a217b1e5cd SHA-256: e29e5698f1963f7fa5fe67d470082162831f4d065dbd96fbbd5d6acfc50685ba
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary focus on a link farm designed to appear as search engine results. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine rankings or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=esl+speaking+activities+for+adults+beginners+pdf
    • http://gisisavodure.22web.org/29014678926.pdf
    • http://xobigapirig.iblogger.org/zeworenubemogewaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_8743e0312e5a4905b513f934265f5dc6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/93a638f8-9d04-46d7-8be6-40bac344767e/concept_of_metrical_romance.pdf
    • https://s3.amazonaws.com/jixeremipet/hollywood_reporter_snl.pdf
    • https://uploads.strikinglycdn.com/files/bf9c23ff-fce5-44a3-aa01-f2cfdbf91fcf/how_to_start_craftsman_rototiller.pdf
    • https://uploads.strikinglycdn.com/files/2a36cf08-9d44-4e10-8144-e50ed62e137a/nilikemomexumapu.pdf
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c15e0d12e4db4a1591092959f2d156ad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/26a7f716-2d3f-4e78-a36b-cec94a3443be/nogilobe.pdf
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_a1ee2a2bde654ce798eb2b714f9b7e96.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81a9f5c1-ee53-4807-8397-dac0b3f2536d/how_long_did_the_great_depression_last_in_australia.pdf
    • https://s3.amazonaws.com/setikizo/81637161949.pdf
    • https://uploads.strikinglycdn.com/files/446381de-f9eb-4857-bd89-f560473561d5/tu_risa_pablo_neruda_poemas_del_alma.pdf
    • http://vevosewis.rf.gd/lorazepam_davis_plus.pdf
    • http://kozukoriz.epizy.com/vogakomarovunuvi.pdf
    • https://uploads.strikinglycdn.com/files/2ae8c333-2cb5-4acd-8f79-c7a2a84a25fa/31770728927.pdf
    • https://uploads.strikinglycdn.com/files/dbba1646-85f9-4012-b89b-282e667b4a1d/94381603465.pdf
    • https://s3.amazonaws.com/gogoxowiniza/22213634378.pdf
    • https://uploads.strikinglycdn.com/files/6c299080-8fb0-48b8-b433-a86e7b864246/top_speed_of_a_kawasaki_mule_550.pdf
    • https://s3.amazonaws.com/fopalew/zivilewenaxiraxigovu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012088.bin
78bc98c89e93b847ace3e8baee701da96d70f79807f2f356c9da4a6f862587fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12088 5424 bytes
font_01_sfnt_off00013305.bin
40d229e5720704034bf76918318b6308cc5806929f4d20334a07c96b348289d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13305 10728 bytes
font_02_sfnt_off00015780.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15780 4324 bytes

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