Malicious PDF — malware analysis report

Static analysis result for SHA-256 032d08f08c2d79e5…

MALICIOUS

PDF

81.2 KB Created: 2021-03-01 02:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 02b2b7f8544d2e2b63f2e967ab7bb4d9 SHA-1: 8869367e2ef9aa05b0e05a7a255530ef8d8e5d22 SHA-256: 032d08f08c2d79e58b3a6492959050c85c9410b8e72720497450ad8a082874cc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=texas+driver+license+course+in+spanish PDF link annotation
    • https://paraminukus.weebly.com/uploads/1/3/4/7/134705680/9941007.pdfIn PDF document text
    • http://ygrash.website/libros_cristianos_de_interpretacion_de_sueos0d6a5.pdfIn PDF document text
    • http://natgood.space/can_i_buy_a_house_in_canada_with_no_down_payment9usys.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/0ec467c9ed354.pdfIn PDF document text
    • http://remastacer.com/tateletizoxiwe65k.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/48118859810082ae.pdfIn PDF document text
    • http://pornbustyvids.com/cien_aos_de_soledad_characterstgffz.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/3530678.pdfIn PDF document text
    • http://requiremcgood.com/jezetebedozutisejurogumivh0rq.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/xusarafadenakix-zipetuguzibi-rovajuzetil-wanavojuxaki.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/buwedur-tijizivob-vopopupisuzuna.pdfIn PDF document text
    • http://habirovradik.ru/pidinixusudatat17u86.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://s3.amazonaws.com/gezetega/cinquain_format_template.pdfIn PDF document text
    • http://fevenubonanez.rf.gd/itv_news_reporters_male.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/fapuxaj.pdfIn PDF document text
    • http://suzebotazolonav.epizy.com/wozuxekew.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/castrol_atf_dex_iii_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/attila_total_war_strategy_guide.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_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 5040 bytes
SHA-256: 06a38da50b8fcba949b3a22c414342a9ca42bafad93c743bf215cf4a7ca0dedb
font_01_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 11064 bytes
SHA-256: 18aa8a776af415ee31daa11b8bff62059d3e0bddd44f269ebabbc5aa3719141b
font_02_sfnt_off000128ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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