Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fc331c63799f84…

MALICIOUS

PDF

75.5 KB Created: 2021-06-06 01:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 972f9e992df71adf16868f3f31adfde8 SHA-1: ed6ed8e5438b92c2da2ddbf30e4dfb970bd28336 SHA-256: 70fc331c63799f845165417cdcf5d93886607b0ddfac6bb61a0fa21fed21d296
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'bologen.ru', which is likely used for phishing or to download a secondary payload. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=adobe+acrobat+scanned+pdf+to+word
    • https://cdn-cms.f-static.net/uploads/4426059/normal_601da2b9f2220.pdf
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fc675e188a6f.pdf
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fe01948a2684.pdf
    • https://cdn-cms.f-static.net/uploads/4451365/normal_6024220224786.pdf
    • https://cdn-cms.f-static.net/uploads/4377114/normal_603438fa2c4b9.pdf
    • https://cdn-cms.f-static.net/uploads/4366995/normal_6055094841e8c.pdf
    • https://cdn-cms.f-static.net/uploads/4380890/normal_606d3c8781d60.pdf
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5fd19a19e220e.pdf
    • https://cdn-cms.f-static.net/uploads/4502493/normal_600dfdb9d2629.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f9d291f9-9ae1-47f2-99f5-f111337793ca/remington_700_sps_tactical_vs_long_range.pdf
    • http://wojipag.pbworks.com/w/file/fetch/144426996/1975876045.pdf
    • http://paderukut.pbworks.com/f/70905011332.pdf
    • https://uploads.strikinglycdn.com/files/b69e29e3-db8e-4d7d-998d-29163ac64510/nirawesadipojekojolatiw.pdf
    • http://pulixojesu.pbworks.com/f/tw_call_recorder_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/66f2821e-5130-4d47-95a2-c345e9f8653a/30217850640.pdf
    • http://xodelow.pbworks.com/w/file/fetch/144644169/tutorufupusulaferupupokar.pdf
    • https://uploads.strikinglycdn.com/files/4b849f83-9b48-4946-a2c2-95e066e5db35/zanuvusokupipukexu.pdf
    • http://mapijakemifo.pbworks.com/f/29836734333.pdf
    • http://faxamom.pbworks.com/f/what_is_the_molecular_geometry_of_if2-.pdf
    • https://uploads.strikinglycdn.com/files/e6b64bce-700c-4523-afc7-82856f877ea0/duxuboxovebujulow.pdf
    • http://sokulus.pbworks.com/w/file/fetch/144655830/dimage.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7be.bin
faaeb7646e9bb01c060658d4129691a4338705e8fca68db68483e3b94b1414af
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 5336 bytes
font_01_sfnt_off0000fa04.bin
73c4017d1979db0a7765dfbd5ded3fc3871c39e8e6465f90536f084b35b59d09
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 11556 bytes