Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b6094793c63d7…

MALICIOUS

PDF

79.5 KB Created: 2021-04-22 03:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d5d90baf95ae48a92349a98a5ad2b52 SHA-1: 517bf1db6c18485ed3f4a6c3a16ada0e887f2e97 SHA-256: 347b6094793c63d78ceb954e54483ea9441127362e3d846a4c76340f3a84fa2f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/strik?utm_term=python+programming+beginners+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377120/normal_6041c7d0abd07.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/pdf_bookmark_editor_online.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://allwoman.site/bl3_anointed_weapons_guideywph4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a64f367cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_601c5f533c433.pdfIn PDF document text
    • http://tesocoin.online/94353769947c3m1e.pdfIn PDF document text
    • http://leopolds.space/super_mechs_full_gameplay2bgvi.pdfIn PDF document text
    • http://russianpatentexpert.com/how_to_set_up_my_account_with_service_canada666lq.pdfIn PDF document text
    • http://investmag.org/mark_bible_quiz_questions_and_answers_in_tamiles2w6.pdfIn PDF document text
    • http://summ-ita.space/27724850567beam9.pdfIn PDF document text
    • http://tiktoktop.design/ccure_9000_certificationlm05i.pdfIn PDF document text
    • http://expo-kit.ru/can_you_bypass_the_lid_switch_on_a_kenmore_washery3z18.pdfIn PDF document text
    • http://fdvsefwfrw.space/554268480785o499.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://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_edcabe52c4884903b5fd11eb099b0a27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/siemens_hearing_aid_models_and_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/mubupabimekejuronovidinan.pdfIn PDF document text
    • http://xakonike.epizy.com/63124592242.pdfIn PDF document text
    • http://modunup.rf.gd/4463807039.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/16831571629.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/66274706490.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_73ce535d93414c31b9594fbac01bb7ff.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 5548 bytes
SHA-256: 5b8816dd417ae8527520f56924b6ad047e89f8ea1ae343398522ff7b0ee1ab98
font_01_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 11716 bytes
SHA-256: 225b2393bd553df49996954116211c4e4275b21ed31079a537d263fa2e46215f
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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