Malicious PDF — malware analysis report

Static analysis result for SHA-256 568a91f84331e7a3…

MALICIOUS

PDF

83.6 KB Created: 2021-03-11 23:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1c0b4c99f76ed333fb8ff71b34c43c2 SHA-1: 3b523ea13dee37defe3aa0223ae9d5eee8aaac7f SHA-256: 568a91f84331e7a3822c7baa220129fe3d2f1e34c432d6fb26ff4db5a5dfd923
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=lost+tribe+of+the+sith+pandemonium+pdf PDF link annotation
    • http://matras-24.ru/13918829356hog1a.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/zerupilagu.pdfIn PDF document text
    • http://mastericy-chistoty.ru/the_complete_gmat_sentence_correction_guideq341t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452154/normal_602f174cb2638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5fdc2f4c761ba.pdfIn PDF document text
    • http://ecoterritory.store/mifatasowuvijibowupagifzqic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fec366aa258f.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/dubojivonu.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/programme_musculation_ectomorphe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_6022826c5841c.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/flash_player_chrome_support_ending.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452373/normal_604992bfdca53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500199/normal_5ff1cd43ea588.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_6007e41dc059a.pdfIn PDF document text
    • http://twenty-promo2020.ru/84664994544ef8ve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/433a5a98-1af7-4858-ba97-cefbe0b4e7ce/how_to_program_remote_to_genie.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/dd_3.5_best_warlock_invocations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7192d685-5713-4626-b3a0-5216b1217888/fluval_305_canister_filter_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4930b5-25ad-45dd-9aff-a9fae72b91a4/12095960639.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/nuvepuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b208f7e-4bd0-4319-a5f2-fe4e0dd3053a/hermosas_criaturas_pelicula_completa_en_espaol_latino_online.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_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 5328 bytes
SHA-256: 71664326b3cac167197d0e409348a715306c57d591c9613ec71c8b24be605d0b
font_01_sfnt_off00011cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 10752 bytes
SHA-256: 3127af0859c8986596392f7eb72064593cb2ed67df075884202483be69579440

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