Malicious PDF — malware analysis report

Static analysis result for SHA-256 937603a6fde2b646…

MALICIOUS

PDF

82.7 KB Created: 2021-01-14 05:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6f6cefef4eac8d302a878a58738908d SHA-1: f98ccb25c2e7b39c4012a8d85a77bdd2831c54db SHA-256: 937603a6fde2b646ab96f9daa051f8c95b4dfde579b9473200b920ddb6d4d33c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/wb?keyword=flurry%20animal%20crossing PDF link annotation
    • https://site-1168207.mozfiles.com/files/1168207/play_impossible_gameball.pdfIn PDF document text
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/fefimamu.pdfIn PDF document text
    • https://site-1177116.mozfiles.com/files/1177116/nafipusibobogupisoxak.pdfIn PDF document text
    • https://site-1175602.mozfiles.com/files/1175602/andretti_racing_experience_atlanta_motor_speedway.pdfIn PDF document text
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/5215891.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/2210359.pdfIn PDF document text
    • https://murezujal.weebly.com/uploads/1/3/5/3/135305344/fokibop.pdfIn PDF document text
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/jevevinotigelo_sifamesef.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/hMZ3haY/dajusavogafisafinekuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fd26dc29b992.pdfIn PDF document text
    • https://site-1181732.mozfiles.com/files/1181732/blackberry_z10_whatsapp_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ja7jgia/office_space_boss_mug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483075/normal_5fce49687d51d.pdfIn PDF document text
    • https://site-1168179.mozfiles.com/files/1168179/mx_player_apk_new_version_2019_download.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/zerogarunanopuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 3684 bytes
SHA-256: 7b36972befa05072e1f3dc94d7b6f2171c5aaf936a039e53b02f0d8ddfc0f26e
font_01_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 4860 bytes
SHA-256: d76c98ed88d606be6fd8d9b283cec051a6fbfb9051572ea941bc6d2b98376e15
font_02_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 11872 bytes
SHA-256: 85d804a533abb289e229797f2ca2f7e52eb505684ea389dd7d3aaaefd459b8c6
font_03_sfnt_off00012f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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