Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f8c5d754b4af36…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 17:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff4e5489f8d3e63f7c2cf0618a75e3dc SHA-1: 3d43efa8b1747532fc8358f4cc3ff6e323558f23 SHA-256: e8f8c5d754b4af368f75e91301511cd87746734f50f008604054930ba81f13df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a high ML score and ClamAV detection as 'Pdf.Phishing.Trojan'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it contains numerous links to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the nature of the heuristics and the presence of many embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.salac.cz/ckfinder/userfiles/files/89544340705.pdf
    • http://ekorepetycje.eu/Upload/file/86031399542.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/c3q4tsgbe9m401skat5oeskosb/96674578769.pdf
    • http://szm.hu/userfiles/file/talolup.pdf
    • http://ceramkgres.ru/userfiles/file/neforujaxufodivinezu.pdf
    • https://ietc-oman.com/userfiles/files/71888211080.pdf
    • https://autonoleggioassereto.com/file/64548769291.pdf
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/7576862449.pdf
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/36813928946.pdf
    • https://mamo-tato.ro/userfiles/file/38378333388.pdf
    • http://northmarking.com/userfiles/files/80906547819.pdf
    • https://vico-real-estate.com/ckfinder/userfiles/files/pexamofasoro.pdf
    • http://clinicaveterinariacene.com/userfiles/files/nedokerurepaje.pdf
    • https://kcss.hu/korosi/userfiles/file/xulimoranijumanubewemuju.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_E5634B3F81DD2240.pdf
    • http://thegoshow.net/userfiles/file/kiwelevatiwivagul.pdf
    • https://commonlawhouse.in/userfiles/file/85706029499.pdf
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/xipexuvuvaj.pdf
    • https://angelsstaff.com/uploads/file/ganodetigidivaw.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f097acc78---40369812149.pdf
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/8413941973.pdf
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/pupune.pdf
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/sewazanebitoredogeweja.pdf
    • http://moretonassets.net/userfiles/3086360299.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=android+serial+number+format
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d97e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 16792 bytes
font_01_sfnt_off0000f195.bin
97711b2b2f001c7138cead4b29e63689987b63af554318098959858d3765b42a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 10736 bytes
font_02_sfnt_off00010a3b.bin
510a7dd7e9fb6a5c74e27426408cb67dc7a9c53c6c844194f7f6f22c2ec2ccd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 17040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.