Malicious PDF — malware analysis report

Static analysis result for SHA-256 877bf76f8e94f346…

MALICIOUS

PDF

78.8 KB Created: 2020-12-25 19:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: edf906de484c27ec6c8664f8951d2f03 SHA-1: 772677476f04fc7cf90249d8e33df5814efa7e3e SHA-256: 877bf76f8e94f3468fdd48bfea874e37f86aae01f1308ac242869075ca48380a
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the heuristic firing for a malicious redirector suggest the document's primary purpose is to direct users to harmful sites.

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
  • 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/aws?utm_term=fallout+3+your+special+guide In PDF document text
    • https://jumegelizo.weebly.com/uploads/1/3/4/7/134712838/mefowozomibi_zujodubigipitor_mosewezaxepi_didafudoz.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/mudigawipivavan.pdfIn PDF document text
    • https://kibewuzogoluwiw.weebly.com/uploads/1/3/1/6/131636689/minonip.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/4386219.pdfIn PDF document text
    • https://padudarudiloga.weebly.com/uploads/1/3/4/7/134714427/866a89c68db676.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/b9989d14-b229-4a8b-bf8d-a4044e455b66/jofonikinipowuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c06b6d-1e4c-45c9-9224-0245a1421970/96052904874.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/phillies_standing_room_only_tickets.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/critical_hit_tables.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/travel_flyer_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805e2cc7-97d5-4e65-b7fe-2557a43c2aa5/sevubifagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f3a5cf-ed55-44b6-8e39-76c6051e73a6/gojelijutuxomejezonanu.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_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 5464 bytes
SHA-256: 5095e6a0e35e7d90b86e1a7e73b1fe85e01fceffcf1ac724b07824cf48fbc6f0
font_01_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 11216 bytes
SHA-256: 018014f29a776a6bc3f7da5ddc2595f4e8c60e73336f0e5a77d20333103030e6

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