Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fab94f5d3cfb03c…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 12:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40c32c8761eb2072351e4e5a0c56157e SHA-1: 443ad2cb549a83fad12dd0f4e8bc70bc4a7fcca3 SHA-256: 3fab94f5d3cfb03c37067a4e49ffaa98797c75920fdcf717b5dfbe2f045a2795
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=why+does+my+motorola+baby+monitor+keep+losing+signal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5ffb8bc37cfa6.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/redal-fumal-kusoriza-pevowekup.pdfIn PDF document text
    • http://fewafef.iblogger.org/litukabakunaxegimafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_60347a1fce9d9.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/vidinegixedowusafepa.pdfIn PDF document text
    • http://pogatodarejo.iblogger.org/is_toronto_stock_exchange_closed_today.pdfIn PDF document text
    • http://lukuvamaki.iblogger.org/what_kind_of_choke_does_a_stoeger_m3500_use.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_6045bbe9c593c.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/apple_ipod_nano_7th_generation_price_in_pakistan.pdfIn PDF document text
    • http://vajogeboru.iblogger.org/lexejivewojikegobapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totawuvibewe.rf.gd/shazam_apk.pdfIn PDF document text
    • http://kupipeda.epizy.com/balloony_land_palringo.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_33c512c710ba4cbe9f74064e35866a6c.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_0b260f55d4a44c04a3e63759680c8119.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_29bb19b3cca14c4480166b5dc005eaed.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_951061d97b39448d9fcd1a695f49e548.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_1468d31fd5994e72b7b73d9c5cf8e1e4.pdf?index=trueIn PDF document text
    • http://duzewinabo.epizy.com/tv_series_answer_for_heaven.pdfIn PDF document text
    • http://saxogif.epizy.com/libro_azul_precio_de_coches.pdfIn PDF document text
    • http://puwomuf.rf.gd/nimagogikutawa.pdfIn PDF document text
    • http://nenenadixipuso.rf.gd/3m_manual_200_ml_cartridge_applicator_gun.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_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 5692 bytes
SHA-256: e45d6f04ac7bca393983e06f11243ebb4337c9b830282003f90008ecc059ce85
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 11500 bytes
SHA-256: 680684a1291d0a47334c4a58c3f86185135b634ba920bb3d32e8ae529aa0abbd