Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f92d20e1bd8689…

MALICIOUS

PDF

72.2 KB Created: 2020-11-18 18:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb98c1fd8edf32e7935e9c1b3b7ccc39 SHA-1: da6ea9eb4316a4cb471e324a932eaa880615f49d SHA-256: f1f92d20e1bd86894f6c4d0cb6863f3b1bef0a5bd979db1f4f81139e54191a15
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://trafffi.ru/123?utm_term=kill+la+kill+ova+25 PDF link annotation
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/b37177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5f992e1b87bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_5fac40b051d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fa56f30ba76c.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/8768ec49ff.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/bd1afd2.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/52ca3b9389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f920bf0ccb42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f9f5720e6744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5fa07d20e2cf2.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/suximawo/21295631334.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/89052634378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c42b07-29a6-4a23-a717-5aa36d7052c0/16862254097.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/59216819092.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_off0000d027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD027 4048 bytes
SHA-256: b6709ed73a922a8b57802e62c1eda01e175a6c844abf8686606ce847918558e1
font_01_sfnt_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 4756 bytes
SHA-256: 0418de24f5248b2f3a7398a0bbd25231b59240abcb852eeeaa7ef44ac6ec7076
font_02_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 10632 bytes
SHA-256: 31db39f98d42072eb66ec87f2f2ceb63b7b3a57d9a06d5ae18b3766761be902d

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