Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c2a48301e3de87…

MALICIOUS

PDF

81.9 KB Created: 2021-05-10 05:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 686fb0eb66ce05b6dd0e4bcf1e6ce375 SHA-1: 9a280b31d1d5f3bf34ba0dcaa76caa28ee43ac45 SHA-256: e6c2a48301e3de8742c9be2805227517a2e5fd9c1a7a3036603485e36630a034
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=baofeng+uv-5re+plus+software+download PDF link annotation
    • http://pedalini.club/nagufalofutasumodesagexufguss.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://instasurprise.online/glo-_bus_simulation_quiz_1_answers28syb.pdfIn PDF document text
    • http://re-prime.ru/romarabijisim9xvrd.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/43181607221.pdfIn PDF document text
    • http://sokolov.fun/vebupal7me7.pdfIn PDF document text
    • http://milano-moda.space/pictoword_level_5231jnib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_6056cce3df91c.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • http://mobile-media.moscow/what_size_subs_are_at_firehouseuynrw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fddd07bcd6da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_602f7a9c2c7fe.pdfIn PDF document text
    • http://future-techno.ru/the_pilgrims_progress_movie_2019_subtitlesv4vrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_6025eed8545d8.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/dudigonifu/revelation_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/kung_fu_panda_cast_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77d3633-2d6f-4f0f-a11e-c7b25151a55d/fovagefi.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/singer_featherweight_221_accessories.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/why_is_my_carbon_monoxide_detector_beeping_in_my_rv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ddacee5-f559-4fa9-8e3a-e63192690eb6/mockingjay_part_2_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/midejifufixagevivemore.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_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 5568 bytes
SHA-256: 9941d5f18589278e6f762af4d6d77a2e2c0a058bc9f59c77d9da72dfbe3523a9
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 11524 bytes
SHA-256: affbdaca629a34ee5019f55d3ae8865f98c877826419670756ec75fd7372f03d

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