Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f69938cc692bc…

MALICIOUS

PDF

64.4 KB Created: 2020-11-13 04:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bb1c9f907b2540bb44f376f2e5f4d108 SHA-1: defc17511c54faac6ce5b27f944dbd300ac6e6cc SHA-256: 322f69938cc692bc2b9091a4c1c2257b4c4a72002e55642afc94674964c374c9
156 Risk Score

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=cartoon+photo+master+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5fac08276c350.pdfIn PDF document text
    • https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/70c09e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_5fade3a9e04a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_5faaa6cbe9a24.pdfIn PDF document text
    • https://gobexuxiwabi.weebly.com/uploads/1/3/4/3/134372757/6432316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9b1ea41c231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8eee1867130.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/b3b17ee6-36a5-4d19-b7aa-b34d81f9720f/the_giver_chapter_18.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/ceramidas_capilar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a09f5bc-d5c1-4b8a-81a4-7c9d91c19cf7/26002413455.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_off0000c0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FC 4932 bytes
SHA-256: eb06c7c09d82aeb5f370774faa317cdb5def92e102191ab7dc6110c2a38639cc
font_01_sfnt_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 10408 bytes
SHA-256: 615415bcbe51da50c2465928d27cdb8a31360487df1f31ae148a3da4e7d65e13