Malicious PDF — malware analysis report

Static analysis result for SHA-256 9282efcc6719369e…

MALICIOUS

PDF

69.1 KB Created: 2021-02-10 13:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b5bc370f9764fbde8042cddd47c222fc SHA-1: e3b1cfae475ce122b05bc467a6825a40b4a2d94f SHA-256: 9282efcc6719369e3940060c033fb52660731a2895409491f9d208699bc886c8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and its classification as a link farm on disposable hosting strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wb?keyword=burnout%20video%20song%20%20prince%20narula PDF link annotation
    • https://cdn.sqhk.co/musezikuzapi/ijhbSta/kill_shot_bravo_hack_apk_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_60091d3dc5206.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/siresuzitegulod.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/bafusinix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_6016380c8180e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_600c6805d2901.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/860842.pdfIn PDF document text
    • https://finiluxib.weebly.com/uploads/1/3/5/3/135350298/bunekigefogijib-widewodidaxal-bobufosa.pdfIn PDF document text
    • http://nuselobire.22web.org/roxixinusudupolineva.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/iajfVxH/6029106896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fed2360746a9.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/SsFOtjj/17854958793.pdfIn PDF document text
    • https://rabupipimefife.weebly.com/uploads/1/3/0/8/130874594/14438ab197cb.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://vosimamasi.epizy.com/jurasigojo.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/election_commission_of_india_form.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/toloxubapidalu.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_off0000c147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC147 5232 bytes
SHA-256: cb37a51e35dc2d38721d92ca3c279127992e6de881dd4d59e936340ebcae56a2
font_01_sfnt_off0000d327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 10976 bytes
SHA-256: 227f5ff0e1b73e03d2865e88ed3b632666af5544f0f6e0134bed83f37d3045ea
font_02_sfnt_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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