Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b0b5db5a8048aa…

MALICIOUS

PDF

69.0 KB Created: 2020-11-25 22:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c792af6efd2e1b3acd8859fca7ee99c2 SHA-1: 15cefa3cdd08672566629195c9a45acbb1f40584 SHA-256: 80b0b5db5a8048aae4f408e04255d550df5920076298cb9c3973cd95396d8e1b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=hamlet+act+1+scene+1+questions+answers PDF link annotation
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/giguxilil.pdfIn PDF document text
    • https://jipunelokafup.weebly.com/uploads/1/3/4/1/134109215/1768839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f94dcac2bd77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_5fb6eb016bb5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456663/normal_5fa62a3f98246.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/surif.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/a228a26482b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fab1a2101860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f9072c98be59.pdfIn PDF document text
    • https://kodetowunim.weebly.com/uploads/1/3/4/7/134701578/soposorezes_jatojujorabiduf_bedirutikobal.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/jinotugiwomo/blessings_of_bebe_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/dometic_microwave_convection_oven_parts.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_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 5176 bytes
SHA-256: daec758486ecab5678b913c128a31931e12eb67be135f4153a9c7859b0912a98
font_01_sfnt_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 10664 bytes
SHA-256: 68efa6c8db3677c93244b361cd564e9716669b053899257c39d7d7d92ad4f26e

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