Malicious PDF — malware analysis report

Static analysis result for SHA-256 578ad070b83f2589…

MALICIOUS

PDF

90.5 KB Created: 2021-04-29 09:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a0eb37cc382303444ff8f9f4d2d13a4a SHA-1: 25ab51a0f0d96cc83e61262991e76d98ebd5a864 SHA-256: 578ad070b83f2589aac3d720f0c52c6b525e8a1bcc4b31de71c490edac46b486
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a suspicious domain associated with a phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://midufefew.ru/strik?utm_term=5+general+rules+of+dimensioning PDF link annotation
    • http://potawuzaj.medianewsonline.com/63406128822.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/kepigazumivop_takuvifex.pdfIn PDF document text
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/745365.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/hg9vOBr/surowezoboregabunax.pdfIn PDF document text
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/3239ac8bd.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/suwavoba.pdfIn PDF document text
    • https://jabukosiw.weebly.com/uploads/1/3/0/8/130874379/8c472c0750fd.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/jbichfR/bavexoluwuwabeniwilegaku.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/iiI4UJp/furniture_mod_minecraft_1._16._3_download.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/fabetasasilo.pdfIn PDF document text
    • https://zoladikadaxupaj.weebly.com/uploads/1/3/4/6/134635808/kudilobomuzeta-pigogor-jisofimu-dazenavapule.pdfIn PDF document text
    • https://cdn.sqhk.co/kosozezoxuxe/ijfi9gi/cadillacs_and_dinosaurs_full_version.pdfIn PDF document text
    • http://kitapusowa.22web.org/ruwir.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/jaicSjc/17593033002.pdfIn PDF document text
    • https://ribelogexarov.weebly.com/uploads/1/3/4/5/134500322/jukidipiliga.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
    • https://s3.amazonaws.com/xezujuxoz/kapukidixuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/zarejokukixo.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/33732229808.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/49774223177.pdfIn PDF document text
    • http://nejabet.epizy.com/fibalixowutuvifib.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/bluestacks_free_windows_8.pdfIn PDF document text
    • http://loratozojakin.epizy.com/excel_weekly_calendar_template_2018.pdfIn PDF document text
    • http://fogosapew.epizy.com/aaru_paranju_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/nawepusemibixonagomu.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/10245811088.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/kudezeponisi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 5060 bytes
SHA-256: 93bd9391688c63fa6b8e236caf3a877234bbf6aa319660f9157efd6093a405af
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 11032 bytes
SHA-256: 348a72203f7b15b618ab4676e96638e795fd98c2dd5f2c8c621c3db6507a7a67
font_02_sfnt_off0001382c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382C 16244 bytes
SHA-256: dc743b41e5c9b9e4d56ad8c22d1311c6eb3cecbc0d04401a7a33aeed2fa7944a
font_03_sfnt_off00014d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D99 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f