Malicious PDF — malware analysis report

Static analysis result for SHA-256 a963ae70fafb402c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-12 02:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: de67971f6f8d7a3ae2b4ea01a3e3c6d4 SHA-1: 7744cef18fe95a97e3ebbafd68e3fe551a0d42fb SHA-256: a963ae70fafb402cab54d5e7fdf056609c66402247b15cba527c822e0bc7fcda
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or trojan activity. The document body, though heavily obfuscated, suggests a lure related to 'Yellowstone campground map pdf', which is likely a pretext to drive users to malicious sites like 'soxebez.ru' or 'ketrovk.xyz'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/award?keyword=yellowstone+campground+map+pdf PDF link annotation
    • http://ketrovk.xyz/how_to_reset_ritetemp_thermostat_8022c65qoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_60341bc0ee8ae.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/2b7MxMm/ninja_masters_wiki_codes.pdfIn PDF document text
    • http://beautytopshop.site/dotiduvabuk2i4hj.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/i9iiYev/39213271906.pdfIn PDF document text
    • https://cdn.sqhk.co/nitumatemi/jbgjhe8/68518567586.pdfIn PDF document text
    • http://lumacy.site/backyard_discovery_oakmont_swing_set_manualjj6yg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423136/normal_5fdeae9769165.pdfIn PDF document text
    • http://wgathering.org/nagegunenasawebuvowimit8f8p.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/578597.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/43703a52.pdfIn PDF document text
    • http://leftoutclub.com/46166913433w0yxt.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/7613710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61daec1-db1f-4c1f-8584-b99415d54574/15568615238.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/zxing_library_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/lopurej.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/28175990581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd15d30-90cb-44cd-b3d0-56c7be786e36/61177449369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159a1565-eba6-440c-90bb-e91350a018a4/40626664444.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/up_btc_marksheet_online_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fdc9b3-0489-4b76-b6d5-6bc1ad7a4fa3/what_is_the_best_class_in_eso.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/2133281080.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_off0000f1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 5528 bytes
SHA-256: bd99edd0def2c1df2b5249f83b30b9441439874e171ad034b82f4ebd666d1aa1
font_01_sfnt_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 10252 bytes
SHA-256: 42ec3c4f084b2d1a4578c401799f8a15379dbe356beb0813040b9ec243de0426

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