Malicious PDF — malware analysis report

Static analysis result for SHA-256 407bd82813f7cc93…

MALICIOUS

PDF

75.7 KB Created: 2020-12-25 08:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eae09aec58f4f243ade9a6c89e7e3d4d SHA-1: 0097223e0706628c9d1388a6cc1b6ab785a7e361 SHA-256: 407bd82813f7cc93b94897a9c5d79bd054c4bd1e864d68be74a4a9758ab55eb2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL being https://trafffi.ru/strik?utm_term=dancing+road+color+ball+run+apk+hack. ClamAV detected the file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of embedded URLs and the link farm structure suggest an attempt to direct users to malicious content, likely phishing or malware downloads.

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://trafffi.ru/strik?utm_term=dancing+road+color+ball+run+apk+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5fa41160ebb24.pdfIn PDF document text
    • https://xufibafit.weebly.com/uploads/1/3/4/4/134403857/1479565.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/cjajbx1/mogono.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fdf2dc9e960d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fc676894dd02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfb00ac-4eca-402c-8154-a533b3809429/61359515759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c42cf4-23cf-4567-a683-e4d27227bc3b/red_ryder_bb_gun_christmas_story_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f7944e-29cb-41b4-a2a3-177de5c888e4/sebubijixikep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c406a6-2263-46e6-882f-b19edab924ce/dojulivinodebobopokoxesuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d5a9e3-47f1-4eae-a163-db52985eee72/jarifapisibivazerujidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f0227f-621d-4f05-9044-239c3c1b0a19/lumizadepok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc47df82-98f9-4815-bfd0-1590bd3cc0be/73506644525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b51c453-50cf-46bb-a307-c840e8c5acca/wutewovuwixebixu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 5360 bytes
SHA-256: 6e0ea18d5526450ed97f13887c4928005e41b234c66dbbebcf3e2009b2238f60
font_01_sfnt_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 11432 bytes
SHA-256: 63c1cbd4e920e631aef32804f179ef1148bc7892834bf752a46899da41b1c450
font_02_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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