Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d8ebcfb63d2afd…

MALICIOUS

PDF

59.0 KB Created: 2020-11-11 15:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8c2312615c5b2b0745a8a4247c006928 SHA-1: d2225ef76e5879dda5f38cd5cce134fffe1638da SHA-256: b5d8ebcfb63d2afd9aeb68e542dc087db689d8ef58c640ba8cebf54ca5f2a2ef
294 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector associated with email account sign-up lures. The presence of MFA and password archive lures further suggests a phishing or credential harvesting attempt. While no scripts were directly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://gettraff.ru/strik?utm_term=email+account+sign+up+hotmail In PDF document text
    • https://pojozuwowate.weebly.com/uploads/1/3/4/6/134631913/kuleve_mazeloturanisiw_luxases_botiwaxas.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8e23ac35501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f8dd32928adf.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/soboziw.pdfIn PDF document text
    • https://kawutakupilim.weebly.com/uploads/1/3/4/2/134236314/b806c61e9c.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/mijanepenomiketuros.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/6068010.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/wumodukubaru/complementary_and_supplementary_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/calculus_and_its_applications_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/private_limited_company_vs_public_limited_company.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/90616505280.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/dd_pathfinder_spiritualist.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/alesund_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/91526150696.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_off0000ae26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE26 5208 bytes
SHA-256: 645986eb0abd251360af775293035c8ff13565e13b24397c1008a460deaece41
font_01_sfnt_off0000bfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB8 9312 bytes
SHA-256: 45b10ccc89f815ab60c07fd1e06fdee3e2a2173f39bdf6fc74f9aaaa10d86389

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