Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abea2b2d077b1b4…

MALICIOUS

PDF

81.1 KB Created: 2021-03-14 06:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a377f1791aa246b69880c9ea9b6d1a03 SHA-1: a08037043906e69dac51cd4f26cf8537d325de86 SHA-256: 9abea2b2d077b1b4e94f859b7a70c07abf893a73e38775fa8fdd8d9f09e5336b
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links to disposable hosting domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to essay writing, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=how+to+start+a+250+word+essay PDF link annotation
    • http://stroy-level.ru/kunir0ltp9.pdfIn PDF document text
    • http://antonioit.space/midasorirutovowusor9og98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_6014b23b8c6ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5fecf3eb4d033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fc6d6ff3b8f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460070/normal_5ff0dff0b4e8a.pdfIn PDF document text
    • https://luvisusarav.weebly.com/uploads/1/3/6/0/136011852/783cae59fc6d0.pdfIn PDF document text
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/rilufiwereg-nozaxe-vimuzajog.pdfIn PDF document text
    • https://potezevaledu.weebly.com/uploads/1/3/1/4/131406960/9db96e9ba.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/primetime_adventures_3rd_edition.pdfIn PDF document text
    • http://benaletuzulug.sportsontheweb.net/88908571879.pdfIn PDF document text
    • https://lomizagufefeg.weebly.com/uploads/1/3/4/0/134096038/c64cd72c994417.pdfIn PDF document text
    • http://bostpolamos.site/bengali_prosenjit_video_song4bhbg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_604d26fd492b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/651f7bc4-eebc-40ea-bf17-b1ca20151f2a/89052592582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c29b8c-61da-4100-acd2-dee14c8666a6/pisokamikawit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659b9340-09c8-4666-ac53-91573cb5d523/how_to_unlock_an_oven_door_ge.pdfIn PDF document text
    • http://guriseb.myartsonline.com/dedewenakuboxenivux.pdfIn PDF document text
    • http://pezamax.myartsonline.com/tixedexotukosiwome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc38c6d-96a7-44a5-a5cc-5ba22943b038/lefesojebamiwizawe.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/informant_app_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/bufefoligovajojivaned.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/41569405988.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/freelance_contract_template_free.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_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 5340 bytes
SHA-256: 639d43cd63f1e2c6b46530a77da52ae5a4becc297c2c879442572e5a97a0efeb
font_01_sfnt_off000111da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 10772 bytes
SHA-256: 21f487dcd577df3ee9691ea63f71c929f6502a0ce33c530d14942aac66555737

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