Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b8c591340906e1…

MALICIOUS

PDF

76.8 KB Created: 2020-12-03 20:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9170e81e00d856d58ea26651cdccb74d SHA-1: d664d3ae850c5ed691580b8682c0f904acdbf0d5 SHA-256: e6b8c591340906e11c61dc302bbda1382f98df1bee6a686874c20152c5175bac
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=morgan+and+morgan+law+firm PDF link annotation
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/kixonakogo_wokab_xanumisigijux.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/7489607.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/sazixipame/segundo_cheque_de_estimulo_2020_junio.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/tokidanato.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d67911f6a41984a7808b/t/5fc662eaeaf37e3b64769cc4/1606836971604/senijovedizovavari.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbd564be903ae6404710/1606220760468/83715620386.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/3036559801.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3bfa08845d092455e657/1606302714975/anna_isd_school_supply_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/59037895535.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/1089267702.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/zenozopekumorediz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f6ef3de5e49b52bb196/1606291323154/98697233831.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f06b104edf1d7780fa74/t/5fc2c3399d79364840e8cb2e/1606599481756/pounds_of_potatoes_per_person_per_year.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06b33fdc31513a110391/1606223540036/msc_seaside_deck_plan_10.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_off0000cd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD09 3208 bytes
SHA-256: 5e550024c0039b8314c6c3ebb79e8d21fd47fba346157369c5d3d1c527c3b0eb
font_01_sfnt_off0000d87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 5148 bytes
SHA-256: 3dc4c887ef817e2deb654cd28921293856a831be910f6286f8e6c664a7a12631
font_02_sfnt_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 11476 bytes
SHA-256: a939f314b9d9534900b089fe92ddf69aa5fe9fb94d0abbe0b8e596c528967e8a
font_03_sfnt_off000110cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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