Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c0e68642d7dbbf…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 14:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d0ac20144beff83bda13d0be660b4c9d SHA-1: 1374b2a4fd152b4c9f1fa3944dedc483b0d8dbfd SHA-256: 62c0e68642d7dbbf1310e2433e7be8383a0875ac3b304af5a50864ea941b9a92
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites, potentially exploiting PDF vulnerabilities or serving as a lure for further compromise.

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://jacksth.ru/strik?utm_term=how+to+install+fan+remote+control PDF link annotation
    • https://birinubawode.weebly.com/uploads/1/3/6/0/136026057/xopovaxuzefevataxuv.pdfIn PDF document text
    • http://tramlaweq.online/97103908104wse6p.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/neganipodutanubaxasube408lg.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/kuwosamavimovet.pdfIn PDF document text
    • https://zejuraxarobepek.weebly.com/uploads/1/3/1/4/131407797/nepuxo_vezamex.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/4465787.pdfIn PDF document text
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/zovemud.pdfIn PDF document text
    • https://nunamifeko.weebly.com/uploads/1/3/2/7/132740424/tabofuporarowekok.pdfIn PDF document text
    • http://kvrovk.xyz/kijexibigibosotodipertcz27.pdfIn PDF document text
    • https://dejatenuti.weebly.com/uploads/1/3/5/3/135348415/a6e1989d8b99.pdfIn PDF document text
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/jaranod.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/988185.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/1156049.pdfIn PDF document text
    • http://garant-ritual.online/5e_character_sheet_form_fillable7qh66.pdfIn PDF document text
    • http://triple-doska1.club/android_10_para_pocophone8tzur.pdfIn PDF document text
    • http://usblighter24.site/social_media_marketing_companies_in_memphisttnea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/kagazemizokirolijipire.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 5080 bytes
SHA-256: c3e99c8230790bcc994ea2bbcf5891e7a7dbf34a417f2b05a1aa125336172e18
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 10632 bytes
SHA-256: cb7791f48a1d3b495826b6fc349c2133ba7184a8172287363200f639f0ae2d52