Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ea98ce5c065fd4…

MALICIOUS

PDF

80.5 KB Created: 2021-02-25 16:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad3278881d56f99800bc6920c1197c91 SHA-1: 2626ee516c2e952f126d17bae709385134975169 SHA-256: 34ea98ce5c065fd42e8605f77486d7653b949b27f00be555663917548b9588be
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

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://bologen.ru/strik?utm_term=how+to+preheat+black+and+decker+air+fryer PDF link annotation
    • https://cdn.sqhk.co/tejosepu/hcgjifP/sosurozowavuriderijojud.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/2jiW6HP/nike_cricket_bowling_spike_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/uzjhjbQ/shader_mod_for_minecraft_pe_1._16.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/nuwebudanupomoranane.pdfIn PDF document text
    • https://cdn.sqhk.co/kepigofunet/bIgijt0/lebogawudubetid.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/tmjeUhh/soredoronuxisineviluxenav.pdfIn PDF document text
    • http://playmarket-online.com/rebamozadafuwufux0cfr.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/zajapelo.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/JhcBDEL/87116682792.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/1028450.pdfIn PDF document text
    • https://kavejujutafen.weebly.com/uploads/1/3/6/0/136022690/kijagowu.pdfIn PDF document text
    • http://busurman.space/gawevufutupavazesotezomaw56cj9.pdfIn PDF document text
    • http://kpovli.ru/15981240579i56f7.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/jgcQLjb/53858675479.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/35a652545.pdfIn PDF document text
    • http://sodalabs.pro/scriptures_on_unanswered_prayersw2c9q.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/fFSxm1y/real_boxing_2_hack_apk_download.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/what_is_the_gpi_of_an_arrow.pdfIn PDF document text
    • http://losinglotterynumbers.com/understanding_viruses_3rd1lry2.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
    • http://fuvuvadut.onlinewebshop.net/27521086514.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_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5212 bytes
SHA-256: 6ce2a1849cad0b93c578b2c79ad0f0c174e8385269e33c531b3fd7e528cd9c58
font_01_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 11256 bytes
SHA-256: abd2920af48988bcdb47412d1e13dc6869aa596646c70fd3e0c938b0f4d751f4
font_02_sfnt_off0001263d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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