Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55a81a0dd4dadfe…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 19:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 407a3180fc7026d0dfbcc55d6be7c083 SHA-1: 5700a214663e08b4cb2b3099e6da10c0edc25a3b SHA-256: b55a81a0dd4dadfe66d037c7170c1c4dd146b1b67da42f2a54b3f69dc42612cb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=wu+tang+clan+saga+hulu+cast PDF link annotation
    • https://cdn.sqhk.co/zikufivol/ijj3ijq/wild_west_survival_shooting_game.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/51476927881.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/gdtsBgh/19905677538.pdfIn PDF document text
    • http://miruzoguke.iblogger.org/antimicrobial_activity_of_lemon_juice.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuvikadob/gfheIgh/ryan_and_friends_police_squad.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/i5gihh5/okc_thunder_vs_rockets_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/hc4PhjT/fire_truck_sirens_download.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/97581079633.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/3hfifHp/83312339692.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/12671134840.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/VPtT2n0/adamantite_armor_terraria.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/kgi0kG1/1717911915.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/fiie9he/puzzles_survival_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/nadoranur/gfeNviX/pac_iowa_school.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/7RgdgcM/ditupuwakimew.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/gceryND/fanematirozagegobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://texaliborobiko.epizy.com/86842258273.pdfIn PDF document text
    • http://fipunagofalava.rf.gd/jirajopikone.pdfIn PDF document text
    • http://gasigigi.rf.gd/63435008839.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/auto_ingles_total.pdfIn PDF document text
    • http://nanoxamovafosox.epizy.com/animation_in_xml_android.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/tirulofa.pdfIn PDF document text
    • http://potovoz.rf.gd/pte_academic_reading_practice_test.pdfIn PDF document text
    • http://zavoxivilog.epizy.com/ross_consulting_club_casebook.pdfIn PDF document text
    • http://rejeremonuwiz.rf.gd/addition_equation_and_conclusion_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 4980 bytes
SHA-256: db972a391a79045bacdaeea9fbf1b4613987d7c8958c6d3f8b7d666588cda63e
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 11188 bytes
SHA-256: a39dd95a271b70c7829ed603a27ba27e5c21988b85793b88bec2b7f40b7d5e26

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