Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d081658e79368f0…

MALICIOUS

PDF

80.2 KB Created: 2021-04-21 23:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 61a8fe442d3e59f53da833a94cb74db8 SHA-1: 9ccfa90add685a287376315f36a7bf2b1f12a8d0 SHA-256: 2d081658e79368f0d53bc1a10cc0ad9310f0d6af019716b83f706260c021c96c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to lead users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=what%2527s+the+difference+between+cat+and+dog+fleas PDF link annotation
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/8084655.pdfIn PDF document text
    • https://tajuzoliv.weebly.com/uploads/1/3/4/3/134359899/7146418.pdfIn PDF document text
    • https://wokubevisaroka.weebly.com/uploads/1/3/4/8/134882568/bulava_pesig.pdfIn PDF document text
    • https://voletiga.weebly.com/uploads/1/3/4/5/134501602/midofes.pdfIn PDF document text
    • http://gavowobow.iblogger.org/assembler_job_description.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/naveroputupumerepawi.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/pojozerutuderip_gedewufa_famederot_vodurozozidavak.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/fih6egf/devil_ninja_2_mod_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/gSibhai/police_bike_chase_city_driving_directions.pdfIn PDF document text
    • https://gejidodedawo.weebly.com/uploads/1/3/4/0/134018108/e5903be.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/gqbwAge/rilipevesuxibekodonox.pdfIn PDF document text
    • https://zatitobeme.weebly.com/uploads/1/3/4/0/134097178/214f8e0.pdfIn PDF document text
    • https://rapironid.weebly.com/uploads/1/3/1/3/131398378/7142443.pdfIn PDF document text
    • http://dujosibixejo.22web.org/59985069617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifotuzo.rf.gd/the_last_song_full_movie_online_123.pdfIn PDF document text
    • http://paserarun.rf.gd/sundiata_an_epic_of_old_mali_dt_niane_summary.pdfIn PDF document text
    • http://kojusefum.rf.gd/three_purposes_for_writing_the_declaration_of_independence.pdfIn PDF document text
    • http://gefexusutem.epizy.com/mosaic_tile_art_templates.pdfIn PDF document text
    • http://retinibefefemo.rf.gd/elvis_presley_how_great_thou_art_lyrics_and_chords.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_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 5564 bytes
SHA-256: 466061b6d0a90784598a22d85bc5e2798b75b6f0dd1f0e47f735eee2ab649323
font_01_sfnt_off00010e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 10844 bytes
SHA-256: 558728d171cd687f9f9d218e2d738148cc58d4fee5d0eba1649b4452404d34df

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