Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2249d39d7a0401…

MALICIOUS

PDF

69.2 KB Created: 2020-11-12 21:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9a292d9f916c89fa458f0facf90dc1cf SHA-1: b341d1a56144d4367a122be6b1aa6183f57e64c7 SHA-256: ca2249d39d7a04019f70485dc6bf77fa85d9de6629bc69fd2f4b740ae95fbe04
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-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://trafftec.ru/strik?utm_term=insanity+workout+plan+month+1 PDF link annotation
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/13df09d87a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5fa11196cd143.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/nopivedufimatetipozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f8c807b7c190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_5f9a850eacfb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5f99ae0d55284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5fa73a6a4aa9e.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/bupijila/81405919313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68fa8759-d523-4074-a7a8-37ba25df711c/comprehensive_list_of_calories_in_food.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/piano_music_disney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24124465-abfe-402b-a9b9-1dd04d2c2807/zevotagixuxibipura.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/jikexonapolaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e798e4fd-894a-4b34-945c-5cd9b6448b16/mulazonapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef91b62-575c-432a-9053-f6f374fb9780/borezumawoxinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f990af85-5d9d-4231-9f6d-c6b3f9dfd0d6/kabe_imamlarC4B1ndan_fetih_suresi_dinle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ca5647-8cd1-4b6e-9408-2597f194a534/how_to_uninstall_wow_on_windows_10.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_off0000d19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 5304 bytes
SHA-256: 85635a3202d171744468c0687a4930e05e956d50d07280fa6b6cef8fd39ad3a7
font_01_sfnt_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 10812 bytes
SHA-256: 514913ce501ddecff8a01ec8d49523879c6d2f3b206063d4766dbb231e2cf718

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