Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbe0cb1534c3658…

MALICIOUS

PDF

75.4 KB Created: 2021-05-02 05:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e32ba600de69de73af6661ff2a55e5f2 SHA-1: 4fa2b048ef7e17712eddbdc417f9e4240ff65d45 SHA-256: 7fbe0cb1534c36586caee8bc627187c0d11bc7dc541d5ee1466117f96b976d7f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The PDF contains a large number of external links, forming a link farm, with one prominent URL being https://botokaw.ru/strik. This suggests the document's primary purpose is to redirect users to potentially malicious or spam-related websites, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=the+bride+julie+garwood+synopsis PDF link annotation
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/f53fc.pdfIn PDF document text
    • https://tewonubipudi.weebly.com/uploads/1/3/6/0/136016370/8161.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/jhhdKVj/hearts_of_darkness_a_filmmaker_s_apocalypse_streaming.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/sukiwivesij.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/ohqLhaM/64049322101.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/dotuzab_vilufoxapabisa_nokad_zekufisa.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/lonozote/what_is_fossil_succession.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_a590f4ddd5234caa92351d7107111ea3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad496356-7671-48c1-bb51-29c32278a0ea/fafomavewigugituw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/viritu.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/16142567526.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_8b830e2a4d2148b186a8658df8cfc15d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/batman_joker_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/dogiwel.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/9560296502.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/stinger_bug_zapper_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/nivilusaxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95510d3-4062-4bf9-af30-32c3dd81f39d/list_of_synonyms_and_antonyms_for_ielts.pdfIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_6d9635cb73544a868bad4f88f0af66c3.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_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 5580 bytes
SHA-256: 135e40ab489880a2177af7662c8fcb7e4d3671c263b0f4fa97a96fb7ce96af99
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 10616 bytes
SHA-256: d87d06742f0b813949a151885efc3c1ff2d3203ed05023158733af8b5dc71601

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