Malicious PDF — malware analysis report

Static analysis result for SHA-256 625c0c62bfadd61b…

MALICIOUS

PDF

75.3 KB Created: 2020-12-31 00:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b729d1f0c74079b1fc5ee144999bf8ac SHA-1: 8ca37ea1ad500c7e2e1b6834faa0a9d9889e8772 SHA-256: 625c0c62bfadd61b93e13f6def2fc735d56c6f7893480ef24f2dd24e9cf0f507
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing trojan. The presence of embedded links and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=netflix+series+virgin+river+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fb33f125487f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f945c0024c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_5fb25885e6b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fe699336e4c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454679/normal_5fbdcb049bc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f91516d5886c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fc31d0264607.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/higoBhd/television_show_quiz_questions.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/4835874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5fdf5156653f1.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/be17b9b5-73ff-4657-991a-5f05761c0341/pioneer_avh_p3100dvd_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83efc637-309c-4715-a534-90d9eddf7999/fikujiwasibafelisewoba.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/nuxuwiwimap.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_off0000e930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE930 5144 bytes
SHA-256: 66055a535bc283a63d7a42de503f8bed8b45c3b0e8421bc37522a8a49fb5cea5
font_01_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 10944 bytes
SHA-256: b518599742c5cdb35f0c2511cdcb3fd84a4949335e49c78de8de711d6a81373a

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