Malicious PDF — malware analysis report

Static analysis result for SHA-256 64097bd461142cf3…

MALICIOUS

PDF

77.1 KB Created: 2021-05-17 00:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 566844197f5719d31a76c7cd9c4b2e6d SHA-1: 10ded6933d60f681d336bbdd7f3c76eb0aa9863b SHA-256: 64097bd461142cf3e19f932051459188f188f13464d6f44cbbac088013a1bbc4
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 0.9996

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://jottigo.ru/strik?utm_term=cyberpunk+2077+ps4+price+malaysia PDF link annotation
    • http://perevod-card2card24.site/dungeons_and_dragons_tomb_of_annihilation_board_game_review9jhlh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499958/normal_6061861067364.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/thinking_in_java_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_603d529643d1a.pdfIn PDF document text
    • http://vowitufafuzebil.scienceontheweb.net/zarupilebopuwid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_600e2364496a9.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/blessed_assurance_satb.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/72337476871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_60290409d81b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6016f89f488c8.pdfIn PDF document text
    • http://4338bacchus.com/re2_super_tyrantifelp.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/27335983872.pdfIn PDF document text
    • http://hookup154.online/jiraxuzuwogatalugifu27bb5.pdfIn PDF document text
    • http://bonifacy.site/bayesian_data_analysis_2nd_editionimqxa.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/dedinavesute/98429153946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbe898d-1fd6-4b58-a038-06bcd797b47e/83032077933.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/spoken_english_interview_conversation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0015dff6-da25-4f7a-ad22-50ff79391a04/92298900631.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/quarter_fold_greeting_card_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/romeo_and_juliet_review_crossword_puzzle_answers.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/tusuxal.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_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 5540 bytes
SHA-256: 01fe10db0d6d4344d40aac0751b78eebad3e3609d0f3cf019b60005356fed310
font_01_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 10876 bytes
SHA-256: 14ba12460e69cb5c566ed7a66036d67d2e55c47f9d1a98e140ad8bcf740d7f45
font_02_sfnt_off00011735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11735 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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