Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f822f18aefc899a…

MALICIOUS

PDF

99.4 KB Created: 2021-01-15 01:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8c96b7d0a33d80639a0816c249d094ae SHA-1: 92b894e606bfd737328bc96fc82c97ec55f84184 SHA-256: 8f822f18aefc899aa576c006ac8b3da287e0fa48c6aac4abc0ed66c87baef2c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm' by heuristics, suggesting a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffking.ru/123?utm_term=asme+section+ix+2013+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/torujazelome/xjfnYe6/83461670982.pdfIn PDF document text
    • https://cdn.sqhk.co/fibafape/yjjgfib/1855358284.pdfIn PDF document text
    • https://tozowibalap.weebly.com/uploads/1/3/4/3/134383498/fawawera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff56ea64bff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fca343d9b2de.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/bYLgfhi/2798065679.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/hijjggo/music_lab_song_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/6hAR1wN/28080863086.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/download_jungle_heat_mod_apk_2019.pdfIn PDF document text
    • https://site-1168510.mozfiles.com/files/1168510/kikususig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5fd7b618e90ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5fd7395789367.pdfIn PDF document text
    • https://site-1175138.mozfiles.com/files/1175138/76185364675.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/mHgc4W5/furious_car_racing_game_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC7 5728 bytes
SHA-256: cdaa762e05549ab6ad86858e8f345f6934452be102eb56eebdf2976530230dfe
font_01_sfnt_off0001423d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423D 14440 bytes
SHA-256: 322718c3cf7a9530ff7cf51a29756bb1b75efd63652dda3f0783180980e188c1
font_02_sfnt_off00017083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17083 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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