Malicious PDF — malware analysis report

Static analysis result for SHA-256 011896983a246e3a…

MALICIOUS

PDF

81.7 KB Created: 2021-03-04 02:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1b830c9cb2739310e1ed315bfd9ce20e SHA-1: ef72b667d3aef68c3246ea3408cdc0a1cba31f38 SHA-256: 011896983a246e3ac1ed609080f4878dbce5ef89c2cb64ec6e25b96cbac46db8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a link farm on potentially malicious hosting. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest the document's purpose is to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=blackcurrant+ice+cream+recipe+guardian PDF link annotation
    • http://gijebuk.iblogger.org/what_is_philosophy_according_to_hegel.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/jbl_flip_5_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_603734ac1f7e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_601d89ae1fd1b.pdfIn PDF document text
    • http://ropilelerenub.iblogger.org/laludako.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/dumujezila.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/vimafudifusivasezinisez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_6022bbc14b3c8.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/34942796404.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/12838169778.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/wings_of_fire_wikipedia_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5fc5e7bb39446.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://tulinavosubod.rf.gd/apush_period_3_review.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/lovigomumisasoxumozarinu.pdfIn PDF document text
    • http://pavipalu.epizy.com/69880930941.pdfIn PDF document text
    • http://wabanatebaxu.epizy.com/vataxoxibal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 5100 bytes
SHA-256: 7dc1903ae53bc845a63b4455cc243df86cbd915763d539c8c8ebb54bd9d74961
font_01_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 10848 bytes
SHA-256: 17187480b31cf2462e2dfd96fe7e007d803108b98a690cfd379189e7476be9f6
font_02_sfnt_off0001163b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 16076 bytes
SHA-256: 75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc
font_03_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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