Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2df0826c1d7916…

MALICIOUS

PDF

74.7 KB Created: 2021-04-20 04:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30777a3c333c4071f5d201d3423dcdd0 SHA-1: b24e663b3541f7c1df5a4127dc16885839eacd57 SHA-256: 5f2df0826c1d79166cfcf451cf74f230b7545519c9a13eb0a82d1a1f2103fa21
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. It contains numerous external links, with one pointing to 'seumenha.ru', suggesting an attempt to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to host or link to a large number of external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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://seumenha.ru/strik?utm_term=what+does+god+say+about+drinking+wine PDF link annotation
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/1902140.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/alfabeto_aeronautico_en_espaolxp76f.pdfIn PDF document text
    • https://difototasewi.weebly.com/uploads/1/3/5/9/135986065/tulawo_samonitixofepiw_befuboduz_verifuwipukedax.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/eU7bqtD/73948250422.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/capablanca_s_hundred_best_games_of_chess.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/gf0hcck/love_island_the_game_season_3_harry_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/c5hapUs/citadel_paint_app_android.pdfIn PDF document text
    • http://azorocheat1.xyz/murray_42_inch_mower_deck_beltilyv1.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/KiasidW/fazododikujaxavudal.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/factors_affecting_buffer_capacity.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/numunenoji/kofekolegoviful.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/devuza.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/kowesorifozuxogorakisi.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/31919348238.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/how_would_you_describe_the_smell_of_autumn.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/animal_farm_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/yamaha_rx-v361_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/printable_calendar_2018_canada.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_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 5468 bytes
SHA-256: f522600d3bdc93730a35fe8fe5cc127d38fb87d15d6f08b1999760c3c3f355eb
font_01_sfnt_off0000f802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF802 11288 bytes
SHA-256: 17131416a10c629681521eca2169fcfb869bf90c4940e1144e20a0ca5ebdc201

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