Malicious PDF — malware analysis report

Static analysis result for SHA-256 85669409ad709d29…

MALICIOUS

PDF

78.5 KB Created: 2021-03-25 12:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe20492317033a52d68ea7447b611124 SHA-1: cee1bb5106cc3a0159bc7a97bcc5d8f51ad81e16 SHA-256: 85669409ad709d29c834a2eedf2a7d48cdee18ea0ca965a6a8629ceda0129753
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain references to 'astrology cafe chart' and 'wkhtmltopdf', indicating a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://botokaw.ru/wix?keyword=astrology+cafe+chart PDF link annotation
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/9565771.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/jggbgiO/48828179450.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/PhihhTO/neutron_music_player_spotify.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/2heiigd/39464709786.pdfIn PDF document text
    • https://roloruvibufezer.weebly.com/uploads/1/3/1/4/131410818/0ac879.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/dLpggie/dipowogufotipot.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/icMhahg/83397322347.pdfIn PDF document text
    • http://misiliv.66ghz.com/jafozedigegu.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/jakexa_tedepogoniv.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/jS6bwha/bcbs_illinois_medical_claim_form.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/W9icsif/1762658358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_0b80a5a4a8ea4fb5adea3b7820d2d560.pdf?index=trueIn PDF document text
    • http://dimugalode.rf.gd/integral_of_csc2x_cotx.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/cnooc_group_annual_report_2017.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_668f536b536c455191c59a126ae8786b.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_f1c5c552878148bfa324860932487405.pdf?index=trueIn PDF document text
    • http://sobogewas.epizy.com/19676871896.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_c028db7c03404ec7a52f548d63bb87e9.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_0bcb83d654374182b76ba9032ea7cd9f.pdf?index=trueIn PDF document text
    • http://rowovenali.epizy.com/76811965217.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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 5232 bytes
SHA-256: 09d60a295559e6d1a5149c18aa77a1fa21ffd11a592fb120b284f8b736b074b1
font_01_sfnt_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 11824 bytes
SHA-256: 922694fc57cc98538c161457055a8a37d2b0e6ad599b9b0cfd2aba14cac1396e

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