Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb8d6b2bdb7321e…

MALICIOUS

PDF

81.6 KB Created: 2020-12-28 02:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 493b40ed86edc108d8b60b4aee55495b SHA-1: d5060a88d9f8ad94dec2a1d2856cf5d8896f75d5 SHA-256: 1eb8d6b2bdb7321e27452f312fe4ba5368e62c767217d76a4adac97761eac848
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=dungeon+quest+weapon+cosmetics In PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/4a83835a3d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454302/normal_5fc283df4e436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420260/normal_5fe1d4dca0892.pdfIn PDF document text
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/wabidunefovof_gabame.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/bisutadigaju_buvip_ridefiwisesoti_febije.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/pujirageg/best_sharon_rogers_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae045d7-9eff-46e0-9de8-fd8ceb2b3ea1/william_burroughs_queer_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fb7f29-a692-4ffe-bc99-d07af8ceea78/flying_chicken_restaurant_seoul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d229ee6-ff0c-45b5-93c4-1909865a7770/pokken_tournament_wii_u_download_iso_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728b64fb-1d94-4592-9da0-117ce6ec718e/wamubovesozopiberijiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a020a51c-4ba3-430c-bd74-10e9fd77a14c/35424428881.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/14459614117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079c30d3-27e9-41cc-ba60-d1d0d2bdb115/ridalokuxegowowalu.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_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 5344 bytes
SHA-256: f1facd628916ecbd213b5f0d3979b7a1ced0dbf3b3e34aba21fe1813238c1bbd
font_01_sfnt_off00011331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11331 11292 bytes
SHA-256: a52546b16b8d1d0f51ed440fa0f7ce7e84b915af80f5bc886531662f39807c9a