Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b47fd5a9f5e48d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-09 18:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 36213fbbf4bbfd9f1ec9295a07ab56b9 SHA-1: 9841825e8c0c9ae6e0cb22c5f1ee15972c25dd00 SHA-256: 46b47fd5a9f5e48d6242813ed61200641d8822ff2e2a0a1f14da4adfc420e7cb
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 and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/award?keyword=ignatius+catholic+study+bible+old+testament+pdf PDF link annotation
    • http://sulelufisumi.iblogger.org/pupepojared.pdfIn PDF document text
    • http://donuliwobem.iblogger.org/video_star_pro_apk_apple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_6046421ef1ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_603ec0863aabf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fffec1d8a507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_6021ce4a675d4.pdfIn PDF document text
    • http://mekikapuleka.22web.org/vubux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_6009d19339582.pdfIn PDF document text
    • http://zibujedi.iblogger.org/radio_button_form_submit_php.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fe00ec11efec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374968/normal_5fcd4182a3275.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_2f01cd1827c54ec5b313e5ad6854c8ac.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_7546bef38536423c94d5378b995cf6c1.pdf?index=trueIn PDF document text
    • http://kiwuvapinemugi.rf.gd/jolly_phonics_worksheets_letter_a.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_04395fc7b1684b0085891376cf0742c8.pdf?index=trueIn PDF document text
    • http://xojokigelofa.rf.gd/ultimate_mortal_kombat_3_sega.pdfIn PDF document text
    • http://segalemu.epizy.com/affinity_diagram_ppt_template.pdfIn PDF document text
    • http://lelekon.epizy.com/zozolusaw.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/23758411033.pdfIn PDF document text
    • http://betupaxomivokab.epizy.com/91999722695.pdfIn PDF document text
    • http://foburug.rf.gd/the_year_one_challenge.pdfIn PDF document text
    • http://tuwewigeniwaf.rf.gd/jogezapedaw.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_5a5d461ce4ea4a9598f52349d6ad0d19.pdf?index=trueIn PDF document text
    • http://negolanimiwop.rf.gd/where_to_buy_replacement_oven_knobs.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_off0000fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 5652 bytes
SHA-256: 7ad085a0e8955f8a058b67367f35adb85857183381386af85741a0dc702751df
font_01_sfnt_off00010d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D78 10640 bytes
SHA-256: 059755c6a82902bfccacca8ad67f68d40bc33461aa486e1f31a9fe852fec573d

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