Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec07b8b709ad1848…

MALICIOUS

PDF

74.5 KB Created: 2021-10-03 00:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b63b921b1b139c985d8180e2d85f46f0 SHA-1: d03340ed63b9bd30b65e83999e94679eb9e7864f SHA-256: ec07b8b709ad1848c583c7a961f8ce23076f28eafce5f246be68ad74d88ef948
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting and utilize UTM parameters, indicating a link farm designed to redirect users to potentially malicious sites. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/uplcv?utm_term=ghost+of+mozart
    • https://roshnaai.com/ckfinder/userfiles/files/92236426820.pdf
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/9103269807.pdf
    • http://kramor.bg/userfiles/file/54358312428.pdf
    • http://isleford.com/filespath/files/20210923094852.pdf
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/libogelagafa.pdf
    • https://eletmodguru.hu/files/files/lesaxerasagitovexafurova.pdf
    • http://plafondchauffant.fr/img/user/file/galuzilanuvizojaxu.pdf
    • http://wccflooring.com/userfiles/files/niraliluravebip.pdf
    • http://9275522-travel.com/userfiles/file/fuwabunusuki.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/firiguw.pdf
    • https://togeltop.com/contents/files/bagoteka.pdf
    • http://j-line.ca/fck_upload/file/54219952219.pdf
    • http://kindergartenhelden.at/upload/file/bivud.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/e4826cf3f9c6382ae330d8e8db220a34/bibepila.pdf
    • https://toananhmedical.com/uploads/files/gimodiwatosekurugagovo.pdf
    • http://dispensapertutti.com/userfiles/files/pimigu.pdf
    • http://hasadtemizlik.com/upload/file/dutad.pdf
    • http://openendrep.com/userfiles/files/zezafoxapebugudov.pdf
    • https://techielingo.com/fck_uploads/files/35613073761.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/161505337a5eef---61318492012.pdf
    • http://premiercontainerlines.com/media/ftp/file/kedumuzejaxamenudenom.pdf
    • https://e-motorcycle.tw/upload/emotorcycle/files/xixirepososason.pdf
    • http://lgassociates.in/uploads/97892971986.pdf
    • https://edex.co/userfiles/files/xikomaridemolixedamarome.pdf
    • 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_off0000bda3.bin
d770ef152282e3f997cd529588c31a0bacfa710c5ff4acb89c19c54a6a1d64c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA3 18412 bytes
font_01_sfnt_off0000ed1e.bin
8478ffb5fd15b29095c37887435bc1250a2f1cf05d12d7bb13976842e76432fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 10204 bytes
font_02_sfnt_off00010419.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 16792 bytes

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