Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6ebbec4226cc0e…

MALICIOUS

PDF

70.1 KB Created: 2021-03-24 06:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7623a2cf0fc6e44cf51d6368b09ada04 SHA-1: fb4d906c93cd1120482ae92ee7dbd4e64b33cad2 SHA-256: cf6ebbec4226cc0e4c11c1e1d929b42521ee4f3174876d60aa749b41617e9ac7
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also indicates a high probability of maliciousness. The presence of a link farm on disposable hosting suggests an attempt to obscure the true malicious destination, which is likely related to the 'mighty knight 2 unblocked hacked' keyword found in the document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://ponafet.ru/wix?keyword=mighty+knight+2+unblocked+hacked PDF link annotation
    • http://gutezazotogilup.22web.org/64515926464.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/45460614625.pdfIn PDF document text
    • https://vegivuben.weebly.com/uploads/1/3/4/6/134660922/14d97624f490449.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/pawafafuvojinize.pdfIn PDF document text
    • https://kawuwulaf.weebly.com/uploads/1/3/3/9/133987507/cf86d033.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/tepolimal_fopajoret.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovabaz.epizy.com/sasuwizepizosenil.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/present_perfect_tense_exercises_pre-intermediate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884e4d49-4ede-485e-848e-19b61f3dcee1/gorado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e833c6-7239-4fbf-9740-a428f7220178/jidedodijuxafujumem.pdfIn PDF document text
    • http://toxanezijar.rf.gd/japifofuronugoxomibujenu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/18390621481.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/20447272984.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_208b1ab0eb004ec1bb62288667011b61.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_c83b3ba4a6d9452289ce99360ecf2375.pdf?index=trueIn PDF document text
    • http://pebotavafusu.epizy.com/ubuntu_18._04_iso_for_virtualbox.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_1a90482a0c0048abb2c4302a6d941d57.pdf?index=trueIn PDF document text
    • http://kedixiravupit.epizy.com/14580219391.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_off0000d3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B1 5372 bytes
SHA-256: 476d635484dca02728b65c24e5ee81c851e65737cbc846ce541053951c024cac
font_01_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 10520 bytes
SHA-256: c7414473000646df108133c6e24144d5c4b19c30a1fb8cb6fab60415fb8c38f9

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