Malicious PDF — malware analysis report

Static analysis result for SHA-256 294302d82bc16090…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 12:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0bd4ede476a55483e03460f951854527 SHA-1: e5bf72469599d1d2d53cbc5ee62911801f359ab6 SHA-256: 294302d82bc16090846fc30b38721f4addd4f7b6bbaba61a585951c927bb52f9
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://cructi.ru/uplcv?utm_term=how+do+you+turn+off+voicemail+on+a+samsung+phone PDF link annotation
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/11421190321.pdfIn PDF document text
    • http://philboyd.com/63413536923.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae2f3f3d87---bokafawozewejimujabivin.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/33645323658.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/dubilibugiturif.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/bubisawakufafijulu.pdfIn PDF document text
    • http://deltools.com/userfiles/file/jasasobe.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/32819947144.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/gidonevowafo.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/mowugigezebivejaparodeka.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/jobonami.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/mivafisanupozosexebo.pdfIn PDF document text
    • http://apvn.info/userfiles/file/84240391547.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/xubakuxuwixaropiguri.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/93444192140.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/8846196603.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/42553725706.pdfIn PDF document text
    • http://potlista.com/file/files/74896271328.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/jakoxotodisowotilekupek.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/ranatexexadilovuwof.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/65297091901.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/sudenanuledama.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/tesazezupijapi.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/jurewuviwupejuli.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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 11424 bytes
SHA-256: 2c9250a5273ca77ba177eac1f71fd0978c8e32be8ef49815efba8cc90251ea70
font_02_sfnt_off00010e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E17 18416 bytes
SHA-256: d35c8785a07bbfb07fe6a304d583053b15f50d4284a793c970e6a57e991a5e86

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