Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f66df233c2b2233…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 02:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6af1fb61541c50df4d51cb7a665fe09 SHA-1: 91d01ff40612e73ad86598cffa50cef3cedd94ed SHA-256: 2f66df233c2b22332a286e4b2c58de3f36c91af5a48ca9900bcdacbfb203605d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and a heuristic identified it as a link farm on disposable hosting. This suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/molowo.pdf In PDF document text
    • http://uhorder.com/upload/files/30138127804.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/34217490443.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/91152650315.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/hf2t0km6g31dgcrf0cfm08m8dc/4928700739.pdfIn PDF document text
    • https://digiconelectronics.com/media/84501362677.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/jugimipinaroloxebigupegu.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/ganizoroguxetunuwafugute.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/31734789382.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/41478558925.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/50661486258.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/jasinuzamazoxedixure.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/gaposalimepekuxowupak.pdfIn PDF document text
    • http://hrudolf.com/userfiles/60361567964.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a43fca8ca7---89079349092.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/bunepimuvalawawofika.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/65298085286.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/dutelelideterasojeg.pdfIn PDF document text
    • http://canvangdientu.com/images/file/54201381667.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/xaroxa.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210911190832.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/suzuzewazigika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=piano+game+classic+mod+apkPDF link annotation
    • 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_off0000d6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 18472 bytes
SHA-256: 451de334a8a889663575d583951244ba919d56bd997fb925accbef93b93784ef
font_02_sfnt_off00011e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E24 10752 bytes
SHA-256: 795ab5156025313cc9bb00b1d412d07fde7109c5877e7ec05167c8bf1cbb6d42

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