Malicious PDF — malware analysis report

Static analysis result for SHA-256 50574bd427421ee9…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 20:35:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 74156798013d2ea2642dda54f4492432 SHA-1: 0e66f37431c39ad682f69006c2bd31245eaa705b SHA-256: 50574bd427421ee968a2317fde6ddf05517b84b6607d11371828200376fcf617
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution campaign. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=bon+appetit+pressure+cooker+pot+roast, which is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=bon+appetit+pressure+cooker+pot+roast PDF link annotation
    • https://cdn.sqhk.co/modonasuje/bfribtV/86218552889.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/zunedovagexopot.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/BTghgjh/cloverpet_bubble_backpack.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/xasizojokevizajakuvo.pdfIn PDF document text
    • https://rofekituluz.weebly.com/uploads/1/3/2/3/132303072/b9b51f0ba.pdfIn PDF document text
    • http://znatural.space/gikurodapesonorisivobezegqjc6.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/72400232838.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/12432617082.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/gjhgihi/49760967310.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/how_to_use_samsung_dishwasher_dw80r2031us.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/ghOALiW/93172612241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://semiwexojexudu.epizy.com/92140707513.pdfIn PDF document text
    • http://jokosen.atwebpages.com/d-in_unlock_tascam_cd-rw900sl.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/motuxagoxujefirunagovu.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/81056172821.pdfIn PDF document text
    • http://wagarimorule.rf.gd/philadelphia_eagles_injury_report_week_12.pdfIn PDF document text
    • http://povovudajax.rf.gd/96402446427.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 5008 bytes
SHA-256: eb6277c1e06e1f2ac4f1d32328ed8dd4ad8c165655854cbcb2741303fe1a2b23
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 10588 bytes
SHA-256: e4b2eb719d2e559a0f0fcfc7d6d35172928dbe6a3ef6226db9827a9ce8ef6cb9

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