Malicious PDF — malware analysis report

Static analysis result for SHA-256 f663069f70a46bb8…

MALICIOUS

PDF

67.2 KB Created: 2020-11-18 07:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 060d2973562f997b38fbb7a4458a8369 SHA-1: d744b393907b5c6c48810cb2ffea5f576b2a9214 SHA-256: f663069f70a46bb8d3b9666424a93cc497fe3e0dad8898cd0aeca1bccbcad33e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=jet+jj-6cs+manual PDF link annotation
    • https://bimenejujuw.weebly.com/uploads/1/3/4/5/134592033/8077397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5f9f09426c61c.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/tipenubaritisak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f903ac49d562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5f939fcba0879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f99f9d546377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fb29c706935a.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/zevutebulaworel/69242900755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70bde120-22a5-45a1-bea5-d70fd43dedbf/19636263394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0591ce37-ea80-4c51-938e-baabcde9a4e9/lomatedudotakutuzewawel.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/tifewufoguvevalawama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb91ab86-80c5-49b4-81b4-23a7796a66b6/40414356224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949b25c3-8516-4b48-889b-9189fa401d51/nijele.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_off0000c8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DB 5100 bytes
SHA-256: 761e282fb8608958e7e9e70d5be2c6ca399ec77e8e473f8c03503968021ef10e
font_01_sfnt_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 11244 bytes
SHA-256: e8a34e83990bf6427c59c6dbeca4b69a8e6ef396538ff20f9f6d0fee768259b8

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