Malicious PDF — malware analysis report

Static analysis result for SHA-256 f071f164ec96012c…

MALICIOUS

PDF

79.4 KB Created: 2021-05-11 08:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2b8ef546d80a2a94ab9c189a3642d2fb SHA-1: 294c9238271ed7b64b28d175be8a92cea330a4a3 SHA-256: f071f164ec96012c2f2d0a64c17fd1948a9015484c16bcc42a2d06825987a2a3
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a significant number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=ver+el+nombre+de+la+rosa+sub+espa%25C3%25B1ol PDF link annotation
    • http://ar-foto.art/all_the_bright_places_cast_finchao1fq.pdfIn PDF document text
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/dagoguded.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/4ab4a.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/iaRgjdB/plan_controlado_telcel_249.pdfIn PDF document text
    • http://enots.space/tofalelanalamapuvobaxowquq.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/how_to_2d_animate_with_blendervknni.pdfIn PDF document text
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/9423560.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/bujeTLe/turbo_driving_racing_3d_game_download.pdfIn PDF document text
    • https://fejovixojik.weebly.com/uploads/1/3/4/3/134333762/lizelumajojidud.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://wumemoxononaw.weebly.com/uploads/1/3/4/2/134235532/f3b782fcc0.pdfIn PDF document text
    • http://promoocaoameericanas.com/43730424251buhne.pdfIn PDF document text
    • https://kuxapularutamux.weebly.com/uploads/1/3/5/9/135984678/6763815.pdfIn PDF document text
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/4193423.pdfIn PDF document text
    • http://revunazem.22web.org/92632879468.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/8de82.pdfIn PDF document text
    • http://ayazshabutdinov.club/business_game_mod_apk09hjw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7b8833d7-014c-4875-9c37-56438ffeb98a.filesusr.com/ugd/ccf209_87d63499f04943478e9f2aa08d4bc5db.pdf?index=trueIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_9e9fbb5e3bec4bac90ee777ed80c9804.pdf?index=trueIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_4c71f02e1e9e427f8028f29ccd01b772.pdf?index=trueIn PDF document text
    • http://totiwofosu.epizy.com/traffic_racer_hack_mod_apk.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5420 bytes
SHA-256: daa4808f7e9b94a651520953a8927f847fba6916aa726e84df470ba739eca17d
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 15392 bytes
SHA-256: 24e4f77703a03b60e2a4493c8d34352d3ccaffee20b2c766903cd87aac21dc29