Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f6f6e6ed1c1c18…

MALICIOUS

PDF

73.8 KB Created: 2020-12-26 22:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5d33920f5b50e5dd1640c20a52c66124 SHA-1: 77bba883025bcb4d82123e9dd9ad12956ba626b1 SHA-256: 70f6f6e6ed1c1c189a52df1fb288606838ea4df80f05fb7281a4d590d6bba655
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, pointing to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafficel.ru/aws?utm_term=functions+of+management+information+system PDF link annotation
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/094c8cecc.pdfIn PDF document text
    • https://cdn.sqhk.co/katafojedul/ihf3hbQ/football_training_equipment_amazon.pdfIn PDF document text
    • https://burakobid.weebly.com/uploads/1/3/4/6/134602904/wusuvodud_kidug.pdfIn PDF document text
    • https://gulawunobuxag.weebly.com/uploads/1/3/4/6/134627092/rikawomupoperemifuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f9ee9712678d.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/9438360.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/c3b2a2801.pdfIn PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/guzebumexa-kaguvitebipoxar-lelekur-lebijigut.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/vubomef.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/jalasilunaz/53721931431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154d9a7e-5d38-4d8b-a268-6b12cae21e43/78293686200.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_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 5108 bytes
SHA-256: b2cf29afea113b3dfd39f2e39ac7454d70dd1a5df2ff6e5c94154285bfe4ab41
font_01_sfnt_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 9864 bytes
SHA-256: 1d31db7974185d50d50ac5dfd72e23cf70cf3723dff41802f6ea815838b59c3f
font_02_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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