Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60aedb45057b3b5…

MALICIOUS

PDF

94.0 KB Created: 2021-09-20 10:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8b9ecdefb62afd1f1da9417016e1b464 SHA-1: 80161aa909840e993e5ed2039ee63ab395d5adfb SHA-256: f60aedb45057b3b5086f7bf4aec7dfedc90d1e5d3acdc21a4749a650da2eee9d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=change+voice+android+call PDF link annotation
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/dometijokuzeboxiw.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/50251409601.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/82530311575.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/35788993674.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/68512478393.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/zefal.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/60579824418.pdfIn PDF document text
    • http://ruihuitax.com/files/file/danuvunabo.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/14738200916.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/70959472384.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/14016185579.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/jexizekiroxitev.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/roverosedavozip.pdfIn PDF document text
    • http://ridendo.cz/files/file/vuxepugovu.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/70269058027.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/rlbn95h96q6aei188d12obqlsm/gavujisezabexudamivab.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/zekatatuminibevegirevawez.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/8242180269.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/46795988479.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/52658680393.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142535b8a4aa---52712082450.pdfIn PDF document text
    • http://contelex.it/userfiles/files/rujazofumunu.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/4422396752.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/vanifunutagomavosowewites.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_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 10480 bytes
SHA-256: a5e18d1dc5713f7fdc20ececdc514fc09326dd3f5fb753ff8d611c1e447e40a8
font_01_sfnt_off000122ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABE 18004 bytes
SHA-256: 337afbfdcc36fc27ae5f11b85947e31ba213e58ab58f941a318f8699765ad4c0