Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d74106005ca3d5b…

MALICIOUS

PDF

71.4 KB Created: 2020-12-16 05:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 25f3b64660b05f9ce1cb2cf32573c622 SHA-1: 1cafe41fe64d70d7a708f0a3e38e6408ae281319 SHA-256: 3d74106005ca3d5be9da389bfa755ec393ed5833a1a687a5e9ec83a9ecf6a518
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for credential harvesting or further payload delivery.

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=supplement+goals+reference+guide+pdf PDF link annotation
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/vupufake.pdfIn PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/3403125.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/werapoko.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/4b3ba9297cd3.pdfIn PDF document text
    • https://goxuxogegeta.weebly.com/uploads/1/3/4/6/134688707/zujonokira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_5fa828aa51a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8726c7dd371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_5fb60bb2bd919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fd2378b4cd16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc50f1792c50b1a1e923a88/t/5fc8674f6652ad59ec27f45d/1606969169151/videzedepimozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78b6fc5-299b-45b8-af3f-e5e92b9be4f6/gitaminefebowazizobafek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e9962bbd74065813b99d/t/5fc571ab1972c46e3c56f466/1606775211168/4973798158.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b5d5bcb0228a2a17c6c/t/5fc846638eecd53e39e4f00c/1606960742700/purus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5184e1c8c7413144d0b9f/t/5fce28091e1a4d7de153dd1b/1607346185943/beluriraselizorujatul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdea5af16e5f16f9482448/t/5fcfa1ea7cc0b10a0ad967ee/1607442922426/95967768389.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 5580 bytes
SHA-256: b87e8bd740dff20bee54a2323a31d5423df5df04b1cb50caa9d64696c657be90
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 10440 bytes
SHA-256: 72fafedb57940c4d7a21c7b7a8da368c5898ea72b5d28702dbd16c9068211449

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