Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad8aab7eea5eae2…

MALICIOUS

PDF

76.6 KB Created: 2021-04-05 20:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a84cdc7b13dd2ee0bad297e7a16153ac SHA-1: 6a54abf737c6405fc460d35b014a32ffa11cb857 SHA-256: 6ad8aab7eea5eae28ec5b72a6f4649100b8e0841b00e6173183c455aa796f0f8
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of a 'download' button lure further supports a malicious intent, likely to trick users into downloading further malware or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://xajibur.ru/strik?utm_term=vox+vt20x+guitar+amplifier+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fc914ab99684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_60287ba344583.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/fec5ef324011.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/independent_events_probability_examples.pdfIn PDF document text
    • https://mumotajesok.weebly.com/uploads/1/3/0/7/130738730/7d53054306.pdfIn PDF document text
    • http://hugertely.xyz/pitegasulurameku3a6rq.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/20d99cf94d.pdfIn PDF document text
    • https://fubudebuz.weebly.com/uploads/1/3/2/7/132712336/d58308.pdfIn PDF document text
    • https://davobudo.weebly.com/uploads/1/3/4/4/134432622/lugaxiduduwaso.pdfIn PDF document text
    • http://fartook.online/98316337046i4y4m.pdfIn PDF document text
    • http://blue-tick-central.com/heart_and_blood_vessels_worksheetm4j5l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fc8b3abe3e96.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/f5163f8e-5e81-4c77-a4a6-9bc0c9ef5b64/72415302163.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/maniac_magee_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b5ebf2-3cb3-4282-ab61-0ff6be826ec3/jurojeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b317d2d8-36a3-4bc6-b7ed-3cdf22af9ff3/craftsman_10in_compound_miter_saw_with_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c81592-9b72-4c04-8af4-6f39dff216e6/mesugugelufafixabeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3754c4d3-2e09-4d98-9cd1-59da76e4b5bc/lexosexikuratopitupomot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b86c88d-e00f-4fd7-b0e0-da2d91c0a9c6/strange_tales_from_a_chinese_studio_themes.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/12s_focus_action_planner.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5504 bytes
SHA-256: 565dfc7ab8b78ad148d2843c5df313ebccbc98c7fd121888841007e446fa317b
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 11432 bytes
SHA-256: 6d86192f80963c824b7eb00b6b30fae5313b53f84213217c78de1bc25aed84d5