Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3e3084ff3dafcf…

MALICIOUS

PDF

73.7 KB Created: 2021-02-11 14:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99af0e6c6c5a695e1a62043c09397ec6 SHA-1: f486b36d7046ac853f5258d2cb601847110b48f0 SHA-256: cc3e3084ff3dafcf1a26c7844247f2802a5c5c983ba11ad89ef9b44441338fdd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the PDF is used to redirect users to potentially malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://seumenha.ru/wix?keyword=sea+turtle+swimming PDF link annotation
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/jetefinujige.pdfIn PDF document text
    • http://uuuuull.space/21188633091gprwl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488807/normal_5fd090d7a296c.pdfIn PDF document text
    • http://spain50off.info/european_shopping_center_development_reportzodkp.pdfIn PDF document text
    • http://jurelireroxux.22web.org/swing_trading_for_dummies_free.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/2I6jehd/air_controller_salary_canada.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/doximasewe_rejogipisegelop_tawej.pdfIn PDF document text
    • http://zobebukore.22web.org/55868090975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_601dc58ee25df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_5feeacb8db25b.pdfIn PDF document text
    • http://flathead.us/825488924104dgy5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/archie_comics_vol_1.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/blackjack_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/48793343392.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/bcs_theory_of_superconductivity_nptel.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/free_piano_sheet_music_canon_in_d.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_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 5200 bytes
SHA-256: 9a8e36915c1a4f8058f123498aea974bdedcedd242937993aac22e2599ef1d46
font_01_sfnt_off0000f79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 10080 bytes
SHA-256: 28960e3d8216193bc3f7d0805e637452a50fab53e4c1d7db923299ffcb69ebc7

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