Malicious PDF — malware analysis report

Static analysis result for SHA-256 da47acf853e515c8…

MALICIOUS

PDF

85.1 KB Created: 2020-11-11 01:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa50a55962f244f692c4cbc7065e4f1 SHA-1: dea1d871a9c0fb1047f29e4eb411d3bab9f381d6 SHA-256: da47acf853e515c8bf67e6c4be144bfba77bdf5460c9c502c169016f30658039
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to further malicious content. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic suggest this document is designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?keyword=irish+to+english+translate
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f981949c3282.pdf
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/8841105.pdf
    • https://mudukexot.weebly.com/uploads/1/3/4/6/134629884/xuponexaxabut-wuxewenoxero.pdf
    • https://cdn-cms.f-static.net/uploads/4462681/normal_5fa9e556ca3e1.pdf
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/rofodo.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66052606-dd76-4d54-af1a-18665caba8a2/ejercicios_de_solidworks.pdf
    • https://uploads.strikinglycdn.com/files/1a0cb629-db90-4178-9f6d-ae1b3f5cf362/transistor_equivalent_circuit.pdf
    • https://uploads.strikinglycdn.com/files/88554bd2-4b5a-4994-8570-e4f31f7f2c9e/free_dake_annotated_reference_bible_online.pdf
    • https://uploads.strikinglycdn.com/files/5522b140-7888-4be5-997a-31bfcddee7ab/pebut.pdf
    • https://uploads.strikinglycdn.com/files/bbff9a51-9c2d-4ef3-a88f-b813e74c0b8a/pixie_plus_sewing_machine_how_to_thr.pdf
    • https://uploads.strikinglycdn.com/files/b6316f87-adb7-407d-ae22-0b828b902da5/98370782315.pdf
    • https://uploads.strikinglycdn.com/files/3c677727-13fd-4c69-bba2-acc0e8758aa1/82083028718.pdf
    • https://uploads.strikinglycdn.com/files/1495958d-56cb-477a-9658-149f0a42ccf7/varerulikijotapi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe8.bin
4a7f9073dd22ccc886a8ae2cd7e34131c761a78351bc755d987db3946bbd7b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE8 4884 bytes
font_01_sfnt_off00012079.bin
d41a7d828e82483cf83710e4fc02e0950e4c1716f26471335063af2120b7b9b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12079 11568 bytes

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