Malicious PDF — malware analysis report

Static analysis result for SHA-256 c675f4d30ba4aff8…

MALICIOUS

PDF

65.4 KB Created: 2020-11-13 17:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 70b5e4679b5965550f5e97d02bcb205b SHA-1: 4a8bb568ab253ab7473e272788db415123e5c4bc SHA-256: c675f4d30ba4aff83ba9909d1a3d5d367f21e0966dab8d349b7ce3d60ecf621d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a PDF_SEO_LINK_FARM, directing to various PDF files. One prominent URL, 'https://trafffe.ru/123?utm_term=penndot+phone+number+philadelphia', suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafffe.ru/123?utm_term=penndot+phone+number+philadelphia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fa2174e33a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f8cb98c48d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5fa601c9652da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f8ee4de345a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f87b6ea636f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f8eac2f22f1e.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/rirebubovatatiwimol.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/muxer.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/vikukinumet/airplane_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/pippa_and_julie_pastourelle.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/how_to_create_a_checklist_in_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/s_blend_worksheets_for_speech_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/x_launcher_prime_apk.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_off0000c57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57E 5164 bytes
SHA-256: e368f2352c376567547a9969b71edc5913f2ea770d9c48f00f9eda4e97f99794
font_01_sfnt_off0000d6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 10016 bytes
SHA-256: 1ca8a24f18a8812e26320fac1e4bc6ca2df3b6c9158009f8ed93c1a61416e67f

Open this report in the interactive analyzer, or submit your own file for analysis.