Malicious PDF — malware analysis report

Static analysis result for SHA-256 944dd9be5edff4f8…

MALICIOUS

PDF

70.6 KB Created: 2021-03-09 10:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: b64658de71cbe6da9b3ae809d60b188a SHA-1: c002e3af7fb73e30bb78c000b6a0c4d1c1ab8d8a SHA-256: 944dd9be5edff4f8b814ea97746a9f7f1aff608a8cbba7bb27ff1937918882a2
186 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 hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a campaign to redirect users to potentially malicious websites.

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://soxebez.ru/wix?keyword=2012+harley+sportster+service+manual PDF link annotation
    • https://xogovowumo.weebly.com/uploads/1/3/0/7/130738979/rizekola_kulejedukuroli_sabiminujajo.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/what_is_the_duties_and_responsibilities_of_an_office_manager.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/new_call_of_duty_modern_warfare_season_7.pdfIn PDF document text
    • http://kijuguwosaxo.22web.org/samsung_a10_frp_unlock_tool_download.pdfIn PDF document text
    • http://ing-cliente.com/what_does_broad_brush_approach_meanjas4x.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/safe_haven_salary.pdfIn PDF document text
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/1428453.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/7116234.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/gd6z5AD/somufedewejadelepevi.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/4d913.pdfIn PDF document text
    • https://cdn.sqhk.co/sufipuxifemo/ChdLfDj/green_bay_weather_forecast_sunday.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/81188588943dhndm.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/9jbhgjc/savukolozumefigip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_8044ce0c92594cb180c60fa70246ea4c.pdf?index=trueIn PDF document text
    • http://fevoreselo.epizy.com/somebigijoka.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_bf7350b961e84deb840168dc9afd44c8.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_80f8854b62424436ab3d63434535616c.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_577c8d5264ea485fbc2e2b112a4ade41.pdf?index=trueIn 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_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 5448 bytes
SHA-256: cb065f9f2175d6fe222b4a95563f04d8ce74b1a49097e04302b0ba99f6e78188
font_01_sfnt_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 9872 bytes
SHA-256: fd3f9e1f17290a3d49016214ae94ad3f85d355bfba8b7f06b2d1622485329e9d
font_02_sfnt_off0000feff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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