Malicious PDF — malware analysis report

Static analysis result for SHA-256 f004da8e5bfe7c8e…

MALICIOUS

PDF

83.3 KB Created: 2021-03-16 08:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8e3ed6686ebaa96c02de1fc91798bf21 SHA-1: 572458d8164daea5a6583b4af27ef3df59f4ddca SHA-256: f004da8e5bfe7c8e89e194b46fc5e952a35d5e1734d4682910afddd515584fa0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings, particularly 'PDF_SEO_DISPOSABLE_LINK_FARM', suggest the document is designed to host a large number of links on disposable domains, a common tactic for phishing or distributing malware. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise, likely leading to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/123?utm_term=windscribe+android+firewall PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5fdb64cddc92f.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/que_caracteristicas_tienen_todos_los_nombres_que_cita_el_poeta.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/74286134996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_600cb786ca530.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/90125743655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388280/normal_5fceed6c63ebd.pdfIn PDF document text
    • http://sokuzise.iblogger.org/maroduzafomibupidar.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/2697935889.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/72da07a5a1c7.pdfIn PDF document text
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/xetam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5fec31e242188.pdfIn PDF document text
    • https://saxotatabaf.weebly.com/uploads/1/3/4/3/134328870/gabiz.pdfIn PDF document text
    • https://kogozodibivuf.weebly.com/uploads/1/3/6/0/136094397/93e852b8867420d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_603759ee45674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5fcd9d9bd75cb.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/enlightenment_now.pdfIn PDF document text
    • https://xilexuluta.weebly.com/uploads/1/3/6/0/136094269/woreb_sofikovivamuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retesatitogeli.epizy.com/blasphemous_final_boss_guide.pdfIn PDF document text
    • http://bugenuvumap.atwebpages.com/tulivufesen.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/zapudowopigumegiwiv.pdfIn PDF document text
    • http://zuvemodu.rf.gd/chrome_pc_windows_10_64_bit.pdfIn PDF document text
    • http://jedolup.rf.gd/24500294731.pdfIn PDF document text
    • http://jiporiri.rf.gd/75623092043.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_off00010662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10662 5260 bytes
SHA-256: aeb33fc48572644ee35169a05911e76175dbdd8a76e734d38ac4687e89db7c25
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 11520 bytes
SHA-256: 50ccecc5b0604e4db07eb25b3d10c86c33b04b7789e8932a4cb98478e9d2c1d1

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