Malicious PDF — malware analysis report

Static analysis result for SHA-256 9230a2f7678a0734…

MALICIOUS

PDF

78.2 KB Created: 2021-03-21 08:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 80fb8bfa1d23a0530e00864fc848e81a SHA-1: 4e06215894e2be4dd902a031a8680d4060e61d57 SHA-256: 9230a2f7678a0734c7257f05b42498f855afd65ff3c996f0af77efe96cad6a63
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=breast+mammography+screening+guidelines PDF link annotation
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/novekitojopona-salajotula-lijisuguwemesa-dogutilixevapa.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/cwnhewz/fopisuvexivozebawof.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/votof.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/ZghiiwA/after_we_collided_release_date_around_the_world.pdfIn PDF document text
    • http://neletaparufo.scienceontheweb.net/serum_amylase_test.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/air_force_1_high_top_white_junior.pdfIn PDF document text
    • https://cdn.sqhk.co/pajegili/s7Uushh/jozedelemotesaka.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/VIhdzA7/zopogafidojil.pdfIn PDF document text
    • http://xigepidi.22web.org/xerekabezuzexexu.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/mjglgep/60199154772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_6049c208753bc.pdfIn PDF document text
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/6463321.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_600273d258959.pdfIn PDF document text
    • https://fubofekibodubeb.weebly.com/uploads/1/3/4/4/134483790/854e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/tadatugupavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea3c8a8-bd73-4729-95a5-31291953569e/jukavasorutogewejili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547f23dd-1d93-40fb-b42a-7b8bc07e9d32/63387678086.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/wematup.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/can_belkin_n300_be_used_as_a_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a339eabd-6ee8-4ab9-8b7d-2bc5d957438f/el_guardian_entre_el_centeno_libro_sinopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ec8ac-4bfa-4028-88e7-0a37c8bdc8d1/how_to_write_an_essay_about_themes_in_a_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8dba20-aa7b-4d1a-b7f0-fb9f29d1fa66/sunawusimafowevuranex.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_off0000f1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 5636 bytes
SHA-256: 12213928ab81c60d0984bb7a991d701e0e99061787ffc248cb11366159bbea85
font_01_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 11476 bytes
SHA-256: 8b9e623c349d4b9226b5e9f18b9906daaf228217379ca12933a7377691760c2f

Open this report in the interactive analyzer, or submit your own file for analysis.