Malicious PDF — malware analysis report

Static analysis result for SHA-256 72aa86da3d172e68…

MALICIOUS

PDF

71.8 KB Created: 2020-11-20 02:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7fef1fc5c7c423c2b0bcfa3c9f79b4dd SHA-1: d8bd26d6fff3a91cd4f42b730289e73feac7994c SHA-256: 72aa86da3d172e686bd618a811e94c9cd83092103e0e4bb1f0840e95e098de20
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 0.9997

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/123?utm_term=free+calendar+for+2019+and+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486354/normal_5fade88fd8e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5f93ad0911069.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/lixazomatama_larupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fa239ebc5780.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/rumivijimipid.pdfIn PDF document text
    • https://xonovezalewame.weebly.com/uploads/1/3/4/4/134489084/25fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5fa4aa6e8fbc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c127d2ed-a366-40cc-8ffb-a64257cb66d9/warhammer_enemy_within.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/tolomakuxofowitova.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/business_intelligence_and_analytics.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/72969736088.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/westinghouse_digital_firmware.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_off0000cea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA6 4936 bytes
SHA-256: 2067a04862b13ee2b5d8593941f97e36ac7608d535a0db8bdc541924d126ef07
font_01_sfnt_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 11084 bytes
SHA-256: ff71952d8fbfb6acc16d05e6f3cb41f2740d0597f6a42a45f2d7f03baabd9ed2
font_02_sfnt_off0001046d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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