Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79cf0365a57e5ba…

MALICIOUS

PDF

80.5 KB Created: 2021-03-14 00:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 89dc905d6878683e81670163ee04d736 SHA-1: 3fdc9de8593079d8e749241aa76bf65ea760d460 SHA-256: e79cf0365a57e5ba3040c801a2812c0c62fe944a8eea42ba9d5d80fb539f3e92
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, with a significant number pointing to disposable hosting services, suggesting an attempt to obscure the ultimate destination or distribute various payloads. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

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://botokaw.ru/wix?keyword=persona+3+yuko+social+link PDF link annotation
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/2575112.pdfIn PDF document text
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/jojujizut.pdfIn PDF document text
    • https://radalumimobexod.weebly.com/uploads/1/3/5/9/135957078/591409.pdfIn PDF document text
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/9fb9e06e182.pdfIn PDF document text
    • http://bestsalestoday.xyz/pavudogasojavuxalo66w.pdfIn PDF document text
    • http://kreativoblako.com/very_mom_seed_ceramide_mask_sheettrrhn.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/doxigusiwuz.pdfIn PDF document text
    • https://wanibezitajijo.weebly.com/uploads/1/3/6/0/136000154/7625693.pdfIn PDF document text
    • http://bawilidow.mypressonline.com/11654357794.pdfIn PDF document text
    • https://gijajagilaz.weebly.com/uploads/1/3/5/3/135313732/16b21fec4.pdfIn PDF document text
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/5ca85053eb.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/zawetitiw-rebutofoxolad-jovavap-xozawirikuset.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/7871839.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/fesugi.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/3913313.pdfIn PDF document text
    • http://alkim.xyz/planos_de_instalaciones_sanitarias_p0baua.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/losapidamukegafuxekuzutij.pdfIn PDF document text
    • https://lozoliso.weebly.com/uploads/1/3/4/7/134775557/wexapuzebaxiruketum.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/f5e5dbac-9494-427d-b380-1699ae93221c/tamil_to_hindi_learning_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0825c1-27b2-438c-a272-f31466c607aa/thrse_raquin_film_2013.pdfIn PDF document text
    • http://moxapowi.myartsonline.com/multiplying_rules_for_negative_and_positive_numbers.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_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5104 bytes
SHA-256: ccdaeeb31b1e73cbe6fe3da3517ead5bc9ac238ad03543ea7092b325b585d191
font_01_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 5124 bytes
SHA-256: c31d12798899b67b2caff05915dd3c0850334c913e86361bc550fe212f2cdcb5
font_02_sfnt_off00010e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E39 11336 bytes
SHA-256: 0d3322eb6d372547bb03a40066787a39c5c703d0b8d43024c8892f64bf2cd903