Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef047aa387c00e82…

MALICIOUS

PDF

78.3 KB Created: 2021-01-05 20:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 830d242c8ccaf008f059cc34f5fed2b7 SHA-1: 90ceb4e6306ba8924dd92aedc9154079cdcf78f3 SHA-256: ef047aa387c00e82884f00134870eb43d70241795bc0abd6c69ee5b4b12533d3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffset.ru/123?utm_term=undertale+theme+song+roblox+piano PDF link annotation
    • https://banafovogakake.weebly.com/uploads/1/3/5/3/135326552/9507078.pdfIn PDF document text
    • https://sonoredepi.weebly.com/uploads/1/3/0/9/130969061/nisamemogagarulojo.pdfIn PDF document text
    • https://jumekurokenawuw.weebly.com/uploads/1/3/0/7/130739991/devenoroweju.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/icjbgig/toy_story_4_drop_down_woody.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/gdhfNgh/nopuwefuwa.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/makunitalapisib.pdfIn PDF document text
    • https://cdn.sqhk.co/xobakidanav/UggigIF/zidumifapadukusug.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/Qkohejg/bandmate_chromatic_tuner_for_chromebook.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/2065946.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/ggIxbe9/messenger_app_issues.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/7f93ca0c-04b2-41fb-aeb4-76250658ce6d/62209273846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2e6082-7eb2-4120-87d8-d0866ff38e35/kakidenukexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cabf573e-1bb6-4077-945e-cdbf0fd27b1d/vixopefedomelidume.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_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 3016 bytes
SHA-256: 8fe238d4efa118d1e805f072976fe3c461391de55fefcb4facfc8f71fb735506
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 5572 bytes
SHA-256: de02df19991a51bf08e5a724a140bfc26fea2e1f0528793afe2aa04cb8e1fa1d
font_02_sfnt_off0001044d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 11792 bytes
SHA-256: 95dc577980e7ef4d2aec37d433991fa307b1c1360cee4ebb9e15838c3118d81b

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