Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ddce0ca6dfbf92…

MALICIOUS

PDF

78.3 KB Created: 2021-09-22 12:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4917ae3ae4db6d1023ede64437741612 SHA-1: 846720caf2470db0ee1598bafbf9501125808130 SHA-256: c2ddce0ca6dfbf92faa7f00d7a36cb59f4b0a36974593d4650fdca555930f8cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=age+of+sparta+mod+apk PDF link annotation
    • http://intelekt.biz/uploads/pages/files/64599711774.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/nusanojitedaxijametekapog.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/78309404597.pdfIn PDF document text
    • http://egitara.com/upfiles/files/50624327839.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/79097898775.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/75444499392.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/81767252083.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/2891267967.pdfIn PDF document text
    • https://revive.fashion/upload/files/vivemurozezumakazoziv.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d3d8692bd2d24ce22183f13298ea1897/tokufex.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/gumazirigakisasemimudov.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/73835886577.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/64333735829.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/vinolugomovofofumivojilis.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/95592706991.pdfIn PDF document text
    • http://topp.pl/_topp/file/95849691133.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/11344090425.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/mujemomoja.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/518581960dbb8907afea824d79039b8a/39209620326.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/nosadujajeluwezofu.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/40773559552.pdfIn PDF document text
    • http://czminghe.com/upload/files/jajixaxab.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_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 18692 bytes
SHA-256: 4ac9223a75d0262c9699b23fce47bdc005aa85a504dcd4136b0cf3aa3dc77022
font_01_sfnt_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 10672 bytes
SHA-256: 33f7e560806b6a5dc0fa3a994f26f31f0875636302aa0a2d5d950bd5891b587a
font_02_sfnt_off00011411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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