Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2553327edf9ebac…

MALICIOUS

PDF

72.2 KB Created: 2021-02-23 11:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: db29982695c9b69b0eb71e4b4d9a2ccd SHA-1: a8af9cff58d6f88eb05f9375e26b45e9439986f5 SHA-256: f2553327edf9ebac24002d15f23ba5f7ca7139343d482a894f5f404ea1c9bbca
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to a movie trailer, likely a lure to entice users to click on the embedded malicious URLs.

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://baarspo.ru/strik?utm_term=their+eyes+were+watching+god+official+movie+trailer PDF link annotation
    • https://nuxinipimop.weebly.com/uploads/1/3/2/6/132682773/dorupabumafured.pdfIn PDF document text
    • http://my-favshopc.online/538702864564do5r.pdfIn PDF document text
    • https://sonikimejikelo.weebly.com/uploads/1/3/2/6/132681145/ruxir_rovazagilajele.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/399575.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/E7uZifB/rankin_bass_lord_of_the_rings_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/dEFKido/facebook_logo_white_vector.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/lagawag.pdfIn PDF document text
    • http://vuvakaduvev.iblogger.org/fenumexererosinop.pdfIn PDF document text
    • http://aires.fun/xolavujavuvijuxofosamoxpou1.pdfIn PDF document text
    • https://tuvugeti.weebly.com/uploads/1/3/4/1/134108896/9391420.pdfIn PDF document text
    • https://nefixesuxu.weebly.com/uploads/1/3/0/9/130969456/bosafozejesab.pdfIn PDF document text
    • http://rotarovew.22web.org/chrysalis_butterfly_transformation.pdfIn PDF document text
    • http://rameautbxy.space/wd_my_passport_wireless_pro_installation8xe0y.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogusobade/gejimgf/guilty_synonym_adjective.pdfIn PDF document text
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/bowulozonubaloseluw.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://wamitut.epizy.com/can_i_pirated_games_in_germany.pdfIn PDF document text
    • http://xebojipex.epizy.com/valor_de_drenagem_linftica_manual.pdfIn PDF document text
    • http://dibulorofo.epizy.com/whirlpool_bottom_load_water_dispenser_costco.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_off0000d192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD192 5424 bytes
SHA-256: ac27bc1ad3800d339aeacb02cd8cb3de824df70476c5f2f85acfc29d72461b88
font_01_sfnt_off0000e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 9824 bytes
SHA-256: 9658008de50dfeaea57e102c4af0a6a430186b23e0dd5cafff0cd2b37f8400bd
font_02_sfnt_off00010548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10548 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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