Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2e757d7273c032…

MALICIOUS

PDF

96.9 KB Created: 2020-11-30 05:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 45de65f4bd55828a2c5ebe9fe46e1478 SHA-1: 9997d7eaeb538dfea11597fd010536ac48c0b701 SHA-256: 2d2e757d7273c032cda3b99a0c8b4e11b42414aab998b6838e98b1887ea6ba78
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary external URIs, 'https://traffnew.ru/strik?utm_term=ffxiv+xelphatol+last+boss', is likely a malicious redirection or phishing endpoint. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/strik?utm_term=ffxiv+xelphatol+last+boss PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5f98a453c63d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_5fb6b8022035b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fad2d519e2c7.pdfIn PDF document text
    • https://bexatumabe.weebly.com/uploads/1/3/4/8/134852132/13c21052c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f9906554ac95.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/jidosatikim/wutaregedematoruzakesum.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/juwiwuzoxeguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db7c6c4-f383-4921-989c-3a3832d32fc3/denver_metro_protective_services_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3396f1a8-e4cf-4d32-8bc1-0e472435a4cc/sergio_buarque_de_holanda_raizes_do_brasil_sociologia.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/birthday_cake_hd_pic_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06aa5851-f8e5-4c40-9bac-00a514553f34/xarunenojodetagoteza.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mm2_value_list_for_corrupt.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 5016 bytes
SHA-256: 369ae3ee5414a8bb5dbb6269869a584c93453161aaf74bae51c254ed72b51d92
font_01_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 5116 bytes
SHA-256: c4ca936a248e445b9274897b6a95061a4dcf4379b414353a86730bc325a0a4f3
font_02_sfnt_off000138ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AE 12296 bytes
SHA-256: 13ebd25814a63b201a924bf77dcf931d5af248de08024ea41cc009623fab9e44
font_03_sfnt_off000160f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F2 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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