Malicious PDF — malware analysis report

Static analysis result for SHA-256 50314ae5cd749732…

MALICIOUS

PDF

79.4 KB Created: 2021-03-27 14:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 869d82f5496cc174ef29aa9f4031463a SHA-1: a570a91c9236e81a6466bcacc0540d31df63341e SHA-256: 50314ae5cd7497322c17cde328093b5aab4711c9888dc32844f3005e828f8106
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. One of the primary external URIs points to a URL that includes a 'how to connect' query, potentially a lure for users seeking information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=how+to+connect+sony+bd+remote+control+to+ps4 PDF link annotation
    • http://zuzorovix.scienceontheweb.net/31076324724.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/9b6a78264a066d.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/jejam.pdfIn PDF document text
    • https://xixolediz.weebly.com/uploads/1/3/4/5/134513169/7019539.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/sagot.pdfIn PDF document text
    • https://zuwiliwiwira.weebly.com/uploads/1/3/1/0/131071082/sowemib.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/3861119.pdfIn PDF document text
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/c7f511c91e.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/fejazufeminezak.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/gejikoso.pdfIn PDF document text
    • https://tasototunone.weebly.com/uploads/1/3/4/7/134755659/1844206.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/ziwesugo.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/799454395.pdfIn PDF document text
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/govojakesegi_zuvawadi_xatonuvo_vetijupum.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/papujamuxeselud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/jekibexetiwapirotonun.pdfIn PDF document text
    • http://penobugixova.atwebpages.com/affairs_cloud_october_weekly.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/40575206610.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/69520941014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff9ebc4-848e-4991-b387-9795a1927562/279716209.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/35141206770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba69099-7651-4159-9c80-8b19536bce0c/glenfield_model_60_serial_number_age_lookup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4596ba10-e90a-460e-8c53-4698cc14729e/how_to_blender_animation.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_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 5392 bytes
SHA-256: 31dc886b682882155bb1b24cd35ebb1b7bdda5341ca64603372e1fb8f29c82e8
font_01_sfnt_off00010a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A17 11032 bytes
SHA-256: a9eb4a103432960bd00020f93a1842035cf9c92b84e7fab14d468dd09d5371df