Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f229452bb1f8242…

MALICIOUS

PDF

94.6 KB Created: 2021-03-21 07:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a871d2eba219a94a0aa1067d6cdbf55d SHA-1: 7b0757f54466abf06215788cac4acc60dda91ed2 SHA-256: 4f229452bb1f82421a25b4e2aad8fde544d18db868e2710dafd30f82ad2c96d2
156 Risk Score

Malware Insights

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

The PDF document contains a lure related to a popular book title, likely to trick users into clicking the embedded malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://xajibur.ru/strik?utm_term=percy+jackson+lightning+thief+audiobook+chapter+11 PDF link annotation
    • http://vorgazme.com/how_many_quarts_of_oil_does_a_2001_honda_rancher_350_holda7kwh.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/73342613413.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/24765096582lf530.pdfIn PDF document text
    • http://cuzinfo.ru/29490186669ysnhe.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/roxulik.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/35817256029.pdfIn PDF document text
    • http://netewe5.xyz/gexodazemupaw6ywke.pdfIn PDF document text
    • http://repair-kompov.ru/720672740881vqd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_37313975114749428290f0d02f3243b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f44980-1e3b-4eb7-8e11-4b309d016892/the_boy_who_harnessed_the_wind_book_grade_level.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/87630401968.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/bushido_the_warrior_s_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344a5ba8-8aab-4670-bb82-3083980976c0/xumipapelaxalolokel.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_4e9d261114a2412d8e63fd4d095a24b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/65194804977.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_6e19e34f05084897a2909b1fd6b52bf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/mowanezarenopamagasin.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/honeywell_6160_keypad_programming_manual.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_a737188ee98748249b30d79a99c532c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jifesu/16648673807.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_6577d071c704458db96aa0065f570441.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/pudeletofanipolud.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/conscious_capitalism_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/trusteer_supported_platforms.pdfIn PDF document text
    • http://vomewudige.atwebpages.com/suffixes_test.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/cyberpunk_2077_better_on_xbox_series_x.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001330f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330F 5852 bytes
SHA-256: 9a3ed43156160384f2ebbd14099bd67bfe289e2599d5a51aaacaaea2d948b15f
font_01_sfnt_off00014707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14707 10332 bytes
SHA-256: c0a4a25034e54285c031859511c951ae87ed5aac4ac5ba66e7d2f945abba5618

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