Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6740461eb375a3…

MALICIOUS

PDF

73.2 KB Created: 2021-03-22 06:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e67e7a8141c28fdb1b2c401fc57b7f3e SHA-1: 6cff010b6667990f0d572c0d47813f285e426674 SHA-256: 4d6740461eb375a36ae3701926fb898bca8caa19922e9f4cef2c339fda7028ea
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate it functions as a link farm on disposable hosting, aiming to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=photo+album+family+heirloom PDF link annotation
    • http://pidusejop.medianewsonline.com/union_transformation_in_informatica_tutorial_gateway.pdfIn PDF document text
    • http://gimagirep.iblogger.org/gotodisesizalele.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/dedawulutakelipini.pdfIn PDF document text
    • http://dizofuses.mypressonline.com/camera_scanner_to_download_apk.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/how_to_pair_logitech_unifying_receiver_without_software.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/pdf_version_of_because_the_internet_screenplay.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/ernest_hemingway_museum_key_west_unusual_animal.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/vedisiburekixaxufunilokow.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/fetotivevexotusaw.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/d9dd634a-9521-462d-8228-4f4adef91176/margin_of_safety_free_download.pdfIn PDF document text
    • http://xexokutofopo.rf.gd/pharmacology_of_anticancer_drugs.pdfIn PDF document text
    • http://reroxiki.epizy.com/antihistaminicos_embarazo.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_dd0cfba7d040437bb57674acfe3e67d2.pdf?index=trueIn PDF document text
    • http://nanaxidimidi.atwebpages.com/new_hotel_business_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894fa66d-a536-4095-8e37-147986544a47/sixabo.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/poruxumasax.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_076d90a729af4e4fb673c426b0d66151.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33238120-1fff-4394-9da7-ac138b7f0f7f/what_are_static_and_dynamic_systems.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/asrock_970_extreme3_ram_compatibility.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_ace8cb38866941c7a999be0771c6a63f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b037591-f884-47ca-9712-ab19f70ef99d/python_beginning.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_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 5072 bytes
SHA-256: 8a110be12e2ce74e6e50de9098f934b55a30db8ba90da971586ff065989e1995
font_01_sfnt_off0000f494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF494 10384 bytes
SHA-256: 46669f896b810fa691ddff0537525f41bf96a12dddacba8a88c1eeb51fd7f972

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