Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee82d6fb1583643…

MALICIOUS

PDF

78.5 KB Created: 2021-05-20 09:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 513bee7f584e6122c777471400936ceb SHA-1: 1eea930c1426b197adf8c8fa4372bf8e0f4cdb90 SHA-256: 7ee82d6fb1583643973e67a17a3d32877c20a49e2f8f5f3e5772d6ad92a5ecca
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are disposable and hosted on various platforms, suggesting a link farm or phishing campaign. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, encouraging users to click the embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious websites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/strik?utm_term=can+you+claim+mileage+back+from+hmrc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5fff5f277d512.pdfIn PDF document text
    • https://bofubesal.weebly.com/uploads/1/3/5/9/135958810/xikoxivabag-dibulanexamepiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5fd386a0d1615.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418783/normal_5fccf8e53df62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488555/normal_5fffb226d4664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_602319eb1a4b2.pdfIn PDF document text
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/gukomewovuk.pdfIn PDF document text
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/d100b444e2c0.pdfIn PDF document text
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/2131807.pdfIn PDF document text
    • https://renejineb.weebly.com/uploads/1/3/5/3/135322717/gedapogod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dupula/giduxogow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31661aea-a3d5-43a2-ba8b-f38e802bae83/mulunodegufok.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/98413830558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54d0666-83b6-4396-965b-f3f0f890c606/how_old_is_the_bowflex_xtreme_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81358d98-cdc8-489d-9f28-e8cf4351aedd/97235103855.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/blue_cross_blue_shield_federal_reimbursement_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f501916-fd2d-4276-81b5-ef54bdd1f156/asus_z97-a_m.2_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa4c5d7-c515-4193-9eca-93a4c35bb4f0/38826041133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1107d7b1-1458-4f03-87ee-007b9cf11969/what_is_a_physiological_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/25379184645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3744f4f0-0a5d-4eb0-a3ef-516fcfca3b8b/22379457427.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/play_free_bingo_games_online_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c20435-22a9-4b98-abb2-af25615c3080/the_third_industrial_revolution_documentary.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_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 5328 bytes
SHA-256: a762535d9a26d7e2e6b1bd47b3b6aaead99f021e85d5757220394ec1d5ce0630
font_01_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 11140 bytes
SHA-256: e77cf0ca1302e7c457c3537117ecc1e3242b7c249324071167f0d662714f37ab

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