Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab59bdd6649dd532…

MALICIOUS

PDF

71.7 KB Created: 2021-04-29 15:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7af2fe7dace7505d7c751dceea1db7ea SHA-1: e7a62a919f4ffbd9e4b12c106903c9c7bc168b7d SHA-256: ab59bdd6649dd5327b146cb7934376fab10ebd7766d56068ba91a4b26f62494a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or to download a secondary payload. No scripts were extracted, but the PDF structure and embedded URI suggest a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=what+does+it+mean+when+your+garage+door+light+blinks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409610/normal_60391e8415320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_601723a090f5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5fdad9dfb1b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_604d32a549f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_604372fe55a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_601469e3bc401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_606e471f4310e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d9dbdf-df76-49c7-b63e-9d133bd90f02/ruvilikov.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_28cd26d2dd8245239ec6bf519e47894b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2845c7-4551-42ed-a38a-c0862a59d10e/how_to_reset_a_lg_headset_hbs_750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4026e8-a7a1-483e-a1c3-7784b86d2b04/56545214608.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_05877fd80822412cb12613f76510eec2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/6368793301.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/angular_2_template_outlet.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_75f05615d39941c89d2c9da09cb02726.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_cb1e479532d546b2835d8bcd127d5843.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_ba3d4cc6c05640dd9f9aef5603778bd1.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_adf37222719c4d7791b4e16898feb656.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_6c3717dfc7ed49449b69f77605ae18ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4179c570-123e-49b4-b5e6-bea964075edf/kesenoxulepunevokilez.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/2301598565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68fc18b9-7b28-48ad-884b-3593c55af37d/rurupemexewapotogogisanux.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_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 5652 bytes
SHA-256: e82e37a5fc2d5f58f75d7c9199af3d54c3d873ee24991507fc795c5f33654e37
font_01_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 11212 bytes
SHA-256: 73286b35a4bf19e754dea879ab0c178cd8f9692c7604041d848cfd218f8da826