Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1e1b3634bb8e8f…

MALICIOUS

PDF

80.7 KB Created: 2021-02-21 21:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e654097cf12a8c9eea6a5b03ffc7cb37 SHA-1: a8e298b69fd440a0cf27c0c3d8452af668a3f59c SHA-256: 4e1e1b3634bb8e8f20af4ca3ebe36629a46ed8f1142744dcc3634ab7ac579ed0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware download.

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://jottigo.ru/wb?keyword=how%20to%20use%20indirect%20function%20in%20excel%20for%20drop%20down%20list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fe474f2de038.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/d3507fea33ce5.pdfIn PDF document text
    • http://thelait.pro/wadeseselq6tg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602302826cb57.pdfIn PDF document text
    • http://iwhite.space/89372708945j595t.pdfIn PDF document text
    • http://neuroncraft.online/hollow_earth_expedition_rpg_reviewl41yh.pdfIn PDF document text
    • http://kvrovk.xyz/diferena_entre_crescimento_economicitwif.pdfIn PDF document text
    • http://wildber.store/d_d_beyond_character_sheet_iosqdv1p.pdfIn PDF document text
    • http://top-shop-store.website/electrolux_air_conditioner_remote_guide6o67q.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/a6286aa1dbfb221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5fe2059801163.pdfIn PDF document text
    • http://esclub.info/74732700762rqa5k.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/roware/kosodozoruxomajuxunewakuv.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/32508581016.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/deriving_from_a_template_class.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/lavejapide.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/ftse_nareit_equity_reits_index_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/lotaji.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_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 5060 bytes
SHA-256: 419bd495ca81058a8310f9e70beed1f8d71e55256cc796009b8438223b2b052b
font_01_sfnt_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 11092 bytes
SHA-256: 6422366b05be73cb8898f3976630e7b5428d973a196c56c17193e291fbe01462

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