Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c1aded6952dffa…

MALICIOUS

PDF

81.4 KB Created: 2021-03-09 18:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6491314d50bb6ea8bce47433f6206d86 SHA-1: 30ffd4f52bc1e7290c278b65d2b938f8868ba84b SHA-256: a6c1aded6952dffa32e181888d5ed73b15c55faf61afd3e6d39297f20e6ff0b1
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/strik?utm_term=aliens+1986+full+movie+download+in+hindi+filmyzilla PDF link annotation
    • http://copyrightprivacy.site/bexopetetoki316ie.pdfIn PDF document text
    • http://shoes-storie.club/what_is_meant_by_economic_exposurehrgwi.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/romonudud_niridefumavuvov.pdfIn PDF document text
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/1144708.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/dell_e6410_i7_specs.pdfIn PDF document text
    • http://reduslim-siteofficial.site/55935100510t3iby.pdfIn PDF document text
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/ronaforoxarame.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/tekunelu_dikenefano.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/duwipizufoje-sukawirozes-zavuvomupaxu.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/english_idioms_in_use_intermediate_book_with_answers_vocabulary_reference_and_practice.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://uploads.strikinglycdn.com/files/6d839ac1-2e9f-4224-a5ec-0cbd8b533205/xegogekeluxurevulomidobip.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/tu_aashiqui_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/nepal_cbs_report_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1bef76-6ed7-479f-897f-4243f8641afa/47608935867.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/9th_grade_biology_textbook_prentice_hall.pdfIn PDF document text
    • http://zapusov.atwebpages.com/71352477205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6fc3cf-e538-46b0-b59e-766727299c81/can_you_boil_munchkin_weighted_straw_cup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5198d0f0-38a5-4ebe-832a-8362fab1249e/frigidaire_fad704dwd_filter_cleaning.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/vudebutilalunuju.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/nuvajuxibefodobuzaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/speedometer_for_gta_san_andreas.pdfIn PDF document text
    • http://gezixus.myartsonline.com/paul_eluard_liberte_analyse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fa2cef-3bd2-4535-819d-d444ca17eefd/53391563035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78dbf2e-ffd0-4a03-acf8-fabb22cc83af/gimadad.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_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 5700 bytes
SHA-256: b55f71236deee2612afff3925210611da5299b39efaa7b4d45b21e9cf8fd5f77
font_01_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 10912 bytes
SHA-256: 99e758174d344a517244d2670455849d7c18dfb8e4630b72823d726d3025702d
font_02_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361