Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be0282a05943872…

MALICIOUS

PDF

76.9 KB Created: 2021-03-20 06:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4644f4a95c490821649e6b0d157f7c4f SHA-1: 78741bee3db4b98cb40c9d6adaa3130b4d072b7c SHA-256: 3be0282a05943872e61ac39c31ec441be57bb309da141293b314aaa2d9be0c5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, characteristic of a link farm or phishing lure, directing users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/wix?keyword=things+that+start+with+w
    • https://cdn.sqhk.co/napumefu/jeibgf1/33901472010.pdf
    • https://vekiruwubutut.weebly.com/uploads/1/3/1/0/131070393/luboj.pdf
    • https://static.s123-cdn-static.com/uploads/4407780/normal_5ffc68cfc630a.pdf
    • https://cdn-cms.f-static.net/uploads/4427293/normal_60145c6397087.pdf
    • https://cdn.sqhk.co/xuxozowaki/cjj9idu/sirovirerovadumiw.pdf
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/suziruvutasa-toxexasu.pdf
    • https://cdn.sqhk.co/nisifowisom/ez1KSIj/89173198434.pdf
    • https://cdn-cms.f-static.net/uploads/4465687/normal_601e3d77e86b3.pdf
    • https://cdn.sqhk.co/zifalulog/JrXihqo/burodojo.pdf
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5ff682c7d8dd8.pdf
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/26877521.pdf
    • https://cdn.sqhk.co/pisomuma/gcsjiig/34099134507.pdf
    • https://static.s123-cdn-static.com/uploads/4444378/normal_5fe11046515d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xarojapi/are_there_boy_scouts_in_australia.pdf
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_d494cead6f1845008ef13dd3389ecbab.pdf?index=true
    • https://s3.amazonaws.com/zurovajij/tuzexemolaw.pdf
    • https://s3.amazonaws.com/kawotexulozax/how_do_you_find_your_house_on_google_maps.pdf
    • https://s3.amazonaws.com/metakibeme/basic_english_words_with_meaning_in_gujarati.pdf
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_aa632eb2cc8a4a6da215b03e5144d8b9.pdf?index=true
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_f7abf65ae696418fa4d012572e1e1a83.pdf?index=true
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_5230fa0f0468459e9e81ca686be5a15e.pdf?index=true
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_d2948ad10eb8411d87cf553c88f6f61d.pdf?index=true
    • https://s3.amazonaws.com/pilazi/tididajuxil.pdf
    • https://s3.amazonaws.com/paxuvagal/is_the_woman_in_the_window_a_good_book.pdf
    • https://s3.amazonaws.com/xapota/rectangular_coordinate_system_exercises_with_answers.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_off0000f018.bin
c0e6edbe4b6f6a2f1d92fab09dba549f254285b487dbd557eb93a4eced8ba6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 4956 bytes
font_01_sfnt_off00010105.bin
b938e8696f5ccf0309f439df23634259c8e6e57a1f272c5e8ae636739660ea17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 10420 bytes

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