Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c886e688bbe256b…

MALICIOUS

PDF

85.8 KB Created: 2021-03-17 21:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bd3a74b0f44eecb46276247c7c0ac12a SHA-1: 1f19f9d535250080291a59adce3f12d164b2ac30 SHA-256: 5c886e688bbe256bc39afae4b893e59bbb14fa573ba7f5ff777efbff482dbd33
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=what+is+the+17+day+green+tea+diet PDF link annotation
    • http://trokot-newshop.online/python_programming_on_win32tua93.pdfIn PDF document text
    • http://tonagruz.ru/example_of_experimental_research_design_titlecjq5a.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/gehgxgj/flow_athletic_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/fghghha/space_colony_games_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/difjajj/pro_microphone_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/hcovVy8/verasijopixuwasofufef.pdfIn PDF document text
    • http://duxorajas.iblogger.org/34149194235.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/7jcgdgf/xaxusositoxiguveru.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabadixi/ejcWgf6/cute_animal_colouring_pictures_to_print.pdfIn PDF document text
    • http://leree6.club/18793686647lkeol.pdfIn PDF document text
    • http://spencermcman.us/80612155665jcq2d.pdfIn PDF document text
    • http://pufaxokijajijev.22web.org/96653039962.pdfIn PDF document text
    • http://metaleagle.ru/lewamozuperufukaojm11.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/oljijhe/77580994778.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/zubata/63461758762.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/widolezetozinalenej.pdfIn PDF document text
    • http://towupew.epizy.com/84117656346.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/pearson_calculus_3rd_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/99875060555.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/33210588463.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/watezemomoraxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/37408477759.pdfIn PDF document text
    • http://xokokikiz.epizy.com/physics_for_scientists_and_engineers_4th_edition_giancoli_free.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_off00010f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F57 5300 bytes
SHA-256: 153f29bff41816f462062d20199a25b2b60f24de0fcfb848dcee62d343611b0f
font_01_sfnt_off00012178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12178 11316 bytes
SHA-256: 3f99f9e8a8a0bdd85537f2aeeff98c90f6e9721753acfa121744649e13e3ef18

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