Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ae511a29885d5d…

MALICIOUS

PDF

72.2 KB Created: 2021-03-24 05:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3a770bb8b7fcfd24ed5a934b23b971ed SHA-1: c5946c7f78c7eeef83189c2471df18a9f52e8088 SHA-256: 68ae511a29885d5d0507cc8930403e8993d6f9eed935e5f7c8b77ea628c04a28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one pointing to 'pelibifir.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing.

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://pelibifir.ru/wix?keyword=partituras+lldm+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476567/normal_60111ad08ee7e.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/gjjcgiz/fiji_airways_news.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_60535e6d1840f.pdfIn PDF document text
    • http://dietnatur.fun/chapati_video_songa509p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_60290abb01e8b.pdfIn PDF document text
    • http://winnerslm.space/falling_water_frank_lloyd_wright_legok8iq7.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/gihkjzC/rogorasemubovelijerasadom.pdfIn PDF document text
    • http://ergors.space/polaroid_onestep_plus_manualbaedl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_602ea3c3043e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5ff5a339eaa75.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/YFhi4ig/89300042596.pdfIn PDF document text
    • http://natorg.fun/boperetabewal2u8lt.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
    • http://pibufesoxol.epizy.com/72793212428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad5c52d-5ea6-4fc4-b73c-2c042a260284/how_to_turn_on_the_water_heater_pilot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd7573d-0f31-4424-8b4e-79737b5296b2/46130543602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35139a5-6274-4615-a6ec-694fb476b5dc/twilight_hindi_movie_full_hd_download.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/aston_martin_v8_vantage_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcce3d2f-9fad-426a-8c92-ef92055c6d44/38517583323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa705f2-de1d-4855-b3bd-8df3d928a88b/55151430871.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAA 4736 bytes
SHA-256: 457550e0bf8cefc02a382a64cca3e7e7d9097b54513b9f9ebcefed6b5be3f45a
font_01_sfnt_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 11204 bytes
SHA-256: 166c87bfa84ad0ee3efad3af0d940170382aac44361f1c310c3a409564bfcabf
font_02_sfnt_off000103b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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