Malicious PDF — malware analysis report

Static analysis result for SHA-256 82aecdfc23712c4c…

MALICIOUS

PDF

96.2 KB Created: 2021-03-30 00:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b468472360a3749f68ec5632d2dc99ac SHA-1: fef9bad9017b76fd5e8dca53d425bc2e8282bb49 SHA-256: 82aecdfc23712c4c66f1993da8396c02e12447b3d3e2a4d08994c8ba4a9e328b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous external URIs, with one prominent URL pointing to a suspicious domain ('dugedepap.ru') that is likely used for phishing or malware distribution. The PDF structure and the presence of embedded links suggest an attempt to redirect the user to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=5.+3+time+management+work+file+answers PDF link annotation
    • http://jumovuv.22web.org/ameristar_warranty_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480412/normal_5fe5f81b3d58b.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/fepuloxaz-zulusujadew-nubigisifen.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/jiliwudututowe.pdfIn PDF document text
    • https://xanerenidijuv.weebly.com/uploads/1/3/0/7/130739333/ececf4225f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5ff5cd1365b1c.pdfIn PDF document text
    • https://fixemebipufuw.weebly.com/uploads/1/3/4/1/134131586/zowipif_latakuxu_gerofanilugopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_602f595524a39.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/01177577f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485800/normal_6051ddba5a26a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_60602a3c2afe3.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/1b51e356-cc68-4cce-a886-1d444ea1469a/imovie_trailer_tutorial_ipad.pdfIn PDF document text
    • http://putojoner.rf.gd/golunimemafuvev.pdfIn PDF document text
    • http://xuxerikafirin.epizy.com/98234088370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d50c913-66d2-4a9c-a751-a1ed2000302a/how_do_i_turn_the_security_light_off_in_my_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcb2bb3-fbc3-42e3-ad7e-d8632c629f04/melowesepadalaluzobiwowu.pdfIn PDF document text
    • http://jigabez.epizy.com/how_to_know_reading_level_of_a_book.pdfIn PDF document text
    • http://zarezelokuka.rf.gd/91770578954.pdfIn PDF document text
    • http://dopexatatadad.epizy.com/after_series_book_5.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_off0001369c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 5468 bytes
SHA-256: 72fb62df050c356ecb3f93ae7e28c05331d1c255bcc54bce3e622aad06390e3b
font_01_sfnt_off0001493f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493F 11964 bytes
SHA-256: 8bff4f133d0dcae4e1434c721a4e366a2d6ab8973a3355ecf2a1ce467616e734

Open this report in the interactive analyzer, or submit your own file for analysis.