Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad4cce7df7791d0…

MALICIOUS

PDF

75.2 KB Created: 2021-10-05 06:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a3e0206a21a59b264de3471df1a85fe3 SHA-1: b946aa770043fe614b9645a954c23d024aa8395d SHA-256: 2ad4cce7df7791d0f520a5fe9f72e300ed448b35f3b4d346bc2472539253ead2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://garglob.ru/uplcv?utm_term=zion+in+december+weather PDF link annotation
    • http://erodiertechnik-wenzel.de/userfiles/file/navawefipot.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130cfb354507---21259456246.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/vetifezopazegelegexu.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/igree1oa9jeqpomp1rthotp5bq/lodewigijudulatotiwavul.pdfIn PDF document text
    • http://hk-keber.de/images/file/jiwififovulufisibobi.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/xuzaropuzatuzedaru.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/88776346701.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/polemika.pdfIn PDF document text
    • http://chinalabware.ru/d/files/nerikoxomisakejusew.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/53802258527.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/pimubetazavojodotiposo.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/99959361378.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/56750387596.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/mefuganovun.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/63332049326.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/borigaxuxebofagozobagep.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/robojisafininitu.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/jaxofalapezumolilimapalaw.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/96206026391.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/miviten.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/62474196756.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 18124 bytes
SHA-256: d401af940ee80db64f64b75ca0bc7ad950fdc6d6afbd845b7c45a3ee78f57234
font_02_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 10612 bytes
SHA-256: 66385edc4542e7bf2ebc1c5d63095f2a972fdfc91c6d026f063220a99f6a3357

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