Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5cbb2beb8dbf95…

MALICIOUS

PDF

75.4 KB Created: 2020-12-27 04:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c8fe7a98d6ab3628181c643bc0b59f6c SHA-1: 9ef4b5b1c536f53b04e0708b7afbce219d911ef6 SHA-256: ce5cbb2beb8dbf954b13c5c10fc6973b8c2ce73441deadb295fc9e30cb7e5d13
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to 'trafffe.ru' for a supposed 'bike racing 3d download mod apk'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafffe.ru/strik?utm_term=bike+racing+3d+download+mod+apk PDF link annotation
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/rajanumanoje.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/93aee83.pdfIn PDF document text
    • https://junenewawaxi.weebly.com/uploads/1/3/1/4/131407408/fezezabukadulejap.pdfIn PDF document text
    • https://zakekeru.weebly.com/uploads/1/3/4/5/134584110/7522548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5fe1ac6f2dd60.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/firija.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
    • https://uploads.strikinglycdn.com/files/780948a0-55d7-4daf-9df3-d029c7af4e0c/oraciones_subordinadas_sustantivas_y_adjetivas_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f159fbb2-5e70-4f93-9147-dc4fd25bff98/tofojupajufupetanozegapov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83337a5-e54f-46ae-889c-6250660a245c/vizio_vx32l_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7592111-282d-482e-b6d0-c9806a4b645f/ying_cheng_adi.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/lagafogekudizasukotebafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862b0cbf-00d6-4efa-96b4-4d4d967fd504/79550604513.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/10288984623.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDF 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off0000d81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 5292 bytes
SHA-256: 599ed560989a92f39c961fc0891e38d431be8052ba5f5c4e74f4bf9787706b82
font_02_sfnt_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 11980 bytes
SHA-256: 1983162d93ae43afd3a4db4406d6d3c4b9d40dffdf1aad6b1bb196fe6077080d
font_03_sfnt_off00011077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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