Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92ce10b969d586a…

MALICIOUS

PDF

64.9 KB Created: 2020-11-25 08:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fd36cb55f15f0c687d77148789c620a8 SHA-1: 199677199f32600630c92263a45f8eba98711490 SHA-256: c92ce10b969d586a58169056f954ad627675f1e43a282db3e7e7ddd6df7bd907
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://traffnew.ru/strik?utm_term=christmas+table+runners+quilted, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution vector.

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://traffnew.ru/strik?utm_term=christmas+table+runners+quilted PDF link annotation
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/2828772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8afd969e651.pdfIn PDF document text
    • https://rosiwefoves.weebly.com/uploads/1/3/4/0/134018148/jubumavapenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fa7f0c4be829.pdfIn PDF document text
    • https://zubukuxazepezox.weebly.com/uploads/1/3/4/6/134600429/b2392285427bf9b.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/91aca6be-42cf-4ce0-8ebd-7c03f24b8fa0/mikro_muhasebe_program_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f0304f-413b-419a-9164-42f954c2975f/matoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119bd480-7c0f-49e9-863c-daba7e6763c5/how_to_do_spoiler_on_discord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d86e092-1d37-45e2-affe-dd98854987a8/nidikevos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d4b3a5-7739-4f48-95f3-ce0216476819/dynastream_ant2usb_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715a2f92-12c3-489e-8db9-66705f51199e/lagibaru.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/ch_i_bi_ging_gii.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_off0000bf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0D 5236 bytes
SHA-256: 650ec85c6326a314af481cd86c6d4c8bb704b058c4956408440a5788bc97a4f8
font_01_sfnt_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 10916 bytes
SHA-256: ab1b875f108ecfd9e94d8e49cfdd8313f8cb90baf9627731b6c4e6c539655266

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