Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f6ce0c07025679…

MALICIOUS

PDF

86.6 KB Created: 2021-02-07 10:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c4a3354df466ac4a4bc87371388b0f93 SHA-1: 1a3727abe0cf484f4cbc87a6736e7d54a2a68ff3 SHA-256: 72f6ce0c070256793468d5a986f2ac71fcc3856b0716b6f3f1e069133b323a3f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, suggesting it is part of a link farm or phishing campaign. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM firing strongly suggest the document is designed to redirect users to malicious websites, likely for phishing or malware distribution.

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://jacksth.ru/123?utm_term=formato+de+evaluacion+de+desempe%25C3%25B1o+360+grados+pdf PDF link annotation
    • https://cdn.sqhk.co/limiwebu/dijxkia/ice_climber_nes_rom.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/1842940.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/egdia2j/project_management_consulting_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_601385d821354.pdfIn PDF document text
    • https://cdn.sqhk.co/xarobumevux/jBz2bjb/shooting_army_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fe9816e57c9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_6000208b912e0.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/tudepuxefisupevu.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/2126675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fc8730c1ec24.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/ggIzjb8/plants_vs_zombies_2_garden_warfare_pc_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jKgeieA/disney_plus_subscription_support_australia.pdfIn PDF document text
    • http://trickyturkey.com/700_common_words_shorthand_book_free_downloadbf69f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/podawakumepewez/amnesia_collection_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/fufes.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/free_antivirus_anti_spyware_software.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/training_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/13016118861.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/vuvapipatol.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/rationalizing_the_denominator_worksheet.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 6044 bytes
SHA-256: f1c22c08dabe74e3f7a5881bbb25faffc51b0f120f4cee997cbdfb7d36f04c8f
font_01_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 11244 bytes
SHA-256: 5f9ac54fd857a5c7c3528db88cf41dcef6fb14a754d8a7d7b7ef6f55e5def85e
font_02_sfnt_off00013c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C38 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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