Malicious PDF — malware analysis report

Static analysis result for SHA-256 662f629c08d82b79…

MALICIOUS

PDF

66.8 KB Created: 2021-01-11 14:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ffd9cbb158b37d5aefa49f747bbb2050 SHA-1: df05f1c9f9b74a3bcb7eb45ae7621f93af718c77 SHA-256: 662f629c08d82b797402fcd69ea817d82746e136ccb23f336377c430e9eded13
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to a phishing or malware-hosting site.

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
  • 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://traffking.ru/123?utm_term=be+joyful+mary+regina+caeli In PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/1a62828d5ba9f66.pdfIn PDF document text
    • https://site-1178774.mozfiles.com/files/1178774/soccer_hero_apk_hack_2020.pdfIn PDF document text
    • https://site-1176787.mozfiles.com/files/1176787/65802759044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5feba423764b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5fa292ebee6fe.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/davubewu/87711203341.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/54828968569.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/jusoredojoruloxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/gijireriwak.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/30710372861.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_off0000c86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86D 5248 bytes
SHA-256: 78c580536c9dce7ea67a6a8860ba0310190c2a4b3a9156e862279e2c25ce8b7f
font_01_sfnt_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 10676 bytes
SHA-256: 5d708e95e86835b8223ab761c5ef91cf50cb6aae778ca2bc76e5e9c2d7e3c4c0

Open this report in the interactive analyzer, or submit your own file for analysis.