Malicious PDF — malware analysis report

Static analysis result for SHA-256 849609c4de4532ea…

MALICIOUS

PDF

71.8 KB Created: 2021-02-28 06:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e2a7a8a597ff16969dfb7c00fe436ef4 SHA-1: 46588f13074ab46cf94c56638781bd79cb151caa SHA-256: 849609c4de4532ea057d8d29db32929bd2b5af8e1414f93d09b28da60c2bcfb8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful content. The document body, though partially garbled, includes references to 'stuccios pizza berwick menu' and 'wkhtmltopdf', which appear to be lures to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/award?keyword=stuccios+pizza+berwick+menu PDF link annotation
    • http://subumobo.22web.org/french_english_dictionary_with_pronunciation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_60131b7c339af.pdfIn PDF document text
    • http://agreevudb.rest/lokelanuxisavixumugmk1e.pdfIn PDF document text
    • http://onlinetiser.website/o_que_fazer_quando_o_bebe_nao_para_de_chorar_de_colica9x0le.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/ghjQfp7/raza_humana_in_english.pdfIn PDF document text
    • http://ramuwazezu.22web.org/photo_nature_hd_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/geSgfif/iot_architecture_should_be.pdfIn PDF document text
    • http://nnorm-id.com/xutuminopikulujijolorr4kh.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/74381630383.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/jf2hjdK/47739314506.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_5feb36251d14e.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/fxifhbi/71346696121.pdfIn PDF document text
    • http://hurricane1.space/xuvefoxelan4npq.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://zexubadisaki.rf.gd/83987651837.pdfIn PDF document text
    • http://vezapuro.rf.gd/acc_aha_cholesterol_guidelines_2018_powerpoint.pdfIn PDF document text
    • http://rizusuzapil.rf.gd/53099295037.pdfIn PDF document text
    • http://siwojanapav.epizy.com/antepartum_risk_assessment_form.pdfIn PDF document text
    • http://zitoxilafeguxu.rf.gd/hot_springs_grandee_filter_cleaning.pdfIn PDF document text
    • http://jokosen.atwebpages.com/wotavofekuka.pdfIn PDF document text
    • http://nemunuj.rf.gd/2325582846.pdfIn PDF document text
    • http://lepamiruketujuf.epizy.com/suxeb.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/30681231679.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 5376 bytes
SHA-256: a02c9ca372f36c8df148018f530ffb3ec5f025f5c42bab53cf3e35bc3b463f2d
font_01_sfnt_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 10620 bytes
SHA-256: 078e2d512b6440bac8874abc35f0d86ca5954aab98f2c87df200af9ec2920bd9
font_02_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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