Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7da3d91139d5651…

MALICIOUS

PDF

75.8 KB Created: 2020-12-29 18:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b051e9a67640083d0add9933a5793809 SHA-1: 32ba51b7ffc2d3aacccb360eeb832418773341aa SHA-256: f7da3d91139d5651a4e5dd3b86eeeb9d1e7fccae798154609933b5c92a9c433c
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion identified as a link farm. One prominent URL, 'https://trafffe.ru/strik?utm_term=super+mario+run+game+download+for+android+mobile', suggests a lure related to game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/strik?utm_term=super+mario+run+game+download+for+android+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5f99d5835587a.pdfIn PDF document text
    • https://lewugudufe.weebly.com/uploads/1/3/4/6/134668986/262fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5fa099498eea4.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/b0ab33e4-17d3-4e7e-997b-aacb33b2ce45/micah_ecumenical_ministries_inc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce4970a-c44b-4fcd-a6fa-52eff6c334ab/lomegufilesoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71da31ea-5da8-438e-bc52-509c1b4def9a/learn_to_fly_hacked_unblocked_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69afa9f8-1792-4306-9604-fe9412522d8a/mififilafub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9082a7-791d-4f17-8d1d-11760aaa495a/mamujemofawawawiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5739de50-d639-4bef-bd10-321f107887c8/3_nephi_24.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb4a5c7-5750-4c18-ad60-0fb805901217/49083084541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38ed52b-c186-47c1-adc2-65e8ce8b48ac/25448636157.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 5520 bytes
SHA-256: 578524b7ef1bba6cca7a9a5db22c1fe6545cb664a6ca88cb0d91a3e797e34a0a
font_02_sfnt_off0000fbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC9 11136 bytes
SHA-256: a62ef3b5124b69198c384e1eb37bd77cd7141cb7897ef9039b4b816cff3c7b49

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