Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0850db87a614ea…

MALICIOUS

PDF

86.6 KB Created: 2021-02-27 19:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: eb3e8896c333754429734c101e3ebd90 SHA-1: 4b0803f896c27bc2827f995158fa27700beb3020 SHA-256: 0c0850db87a614eaed190b0e8f147f6ba832acb4399c38022338654ff4a081e8
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically lures the user with a printer driver download. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/123?utm_term=hp+laserjet+1320+printer+driver+for+window+10 PDF link annotation
    • http://labiluwewinedu.22web.org/stihl_grass_trimmers_reviews.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/16564867248.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/bTvjdwy/24169467248.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/e5dce.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/77162298748.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejibanunepi.myartsonline.com/engineering_drawing_machining_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/sobapasaberow.pdfIn PDF document text
    • http://vikuladaputak.rf.gd/zudetov.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/xisimalawategupapadu.pdfIn PDF document text
    • http://wiwafejopof.epizy.com/manebogopo.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_off00011621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 5716 bytes
SHA-256: 8f06ed7fa7a46c1fedde78c2a8e41e91b61503b6a0ec2de9a1e4ce090e87861c
font_01_sfnt_off000129b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B8 10356 bytes
SHA-256: 977b5ad2c2341679d5c810196a51c4f9bd66e0eeb1cfc6cc9b75f171728b20e1

Open this report in the interactive analyzer, or submit your own file for analysis.