Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e58ec98e120b8d3…

MALICIOUS

PDF

82.7 KB Created: 2021-03-26 18:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc96de462bdc098005e02c11ff2cf2c7 SHA-1: 23fd6a11456292b9dc4b14e8dd1d8329754e0d05 SHA-256: 8e58ec98e120b8d3a61f7e4c0188dc148ffbf17addca94b8afb102c6b1579045
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging social engineering to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://dugedepap.ru/123?utm_term=antimicrobial+resistance+uk+report PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/babezikediwenafunowexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_60249562da38e.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/what_are_manual_j_calculations.pdfIn PDF document text
    • https://donikigegetala.weebly.com/uploads/1/3/4/3/134311768/wajenewudemolodozeje.pdfIn PDF document text
    • http://depotupunejiwo.iblogger.org/42529028803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_5fd879429e9a4.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/tepafe_dulusi.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/vejabelowipedupulok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369496/normal_5fe02b4966c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_60592b2b4e6c5.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/carcinoma_pancreatico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_604d21fe18ab1.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/xirixepo/zupasizonafatu.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_9592a27d4c964e15ae9ebd18e71da1e0.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_c2ad861b13ad4141907bfae4f5a55ce7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/84886417855.pdfIn PDF document text
    • http://kijolitenelofon.epizy.com/thomas_calculus_instructors_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/45535886346.pdfIn PDF document text
    • http://pesivosemero.epizy.com/cbse_syllabus_for_class_10_science.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/zexuzokuvafatile.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_41e700ef801e40deb6bd548d4258a7b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/dadubo.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_b01bde33f72642eebfb924db3c92a061.pdf?index=trueIn PDF document text
    • http://xusapibu.onlinewebshop.net/dr_bruce_lipton.pdfIn PDF document text
    • http://rojiferavu.epizy.com/posesor.pdfIn PDF document text
    • http://tosaxope.rf.gd/chori_chori_1956_video_songs_free.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_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 5272 bytes
SHA-256: fea27490d64d2a11b4112f2696f49db815cc017397de512f90748e065c69fce0
font_01_sfnt_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 11664 bytes
SHA-256: 7ee90f585fa1fb25568c61990c874f5a15e893b2e5ca7a4298b447f81fcf22ad