Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddbc532673ea59b…

MALICIOUS

PDF

88.1 KB Created: 2021-07-28 09:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22fb4af2761f1f189aba5eaac7b30164 SHA-1: 92d466403b9ca07a217e352e77a55a809ccd6e79 SHA-256: 0ddbc532673ea59bfb5f332808e30de362958aabc80778fd5f14535630d940e9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://rakkhunnursinghome.com/user_img/files/xobizizinufijataxoxum.pdf
    • http://geose.ru/userfiles/file/87884837036.pdf
    • https://bobecoingatlan.com/uploads/editor/file/sapuduviwigab.pdf
    • https://faprosid.com/file/48354800727.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/1bqpb2vvep7ofcv1r1ua2cro2l/mesorateroditow.pdf
    • http://alfavs.eu/userfiles/file/93011014565.pdf
    • http://ecohost.ru/pics/images/file/31312468966.pdf
    • http://goldenpeak.it/userfiles/files/61061186652.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/7lir9oavobgv6d759cvo9fs9pc/41298242009.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d203d5e369e---motemotutekejoxabono.pdf
    • https://infrastone.com/userfiles/files/kuvozijonapepunigon.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/6a249e8978ec32c62f80a6c7d1a4dd5f/75521282695.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/49de5c4fa2f0c679526e1b6957401ea5/pisemulujesude.pdf
    • http://adveotec.com/img/file/25886994740.pdf
    • https://dichvuketoansg.com/luutru/files/baxogeribetib.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05646b293---kowugoxatatujeg.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2989edbabb---mukaginuko.pdf
    • http://heryeryesil.com/resimlerfiles/bisulegike.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bb1c41b3c---48067068054.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0b5f0a3560---vedelupefot.pdf
    • http://yachtandgulet.com/userfiles/file/10816234993.pdf
    • http://doudou.tw/userfiles/files/76446242916.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e6b20149---monulogoxifixuga.pdf
    • http://bestorkate.com/uploads/ckeditor/files/nidifugofu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=sindh+anti+corruption+act+1991+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_off0000f4f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 16792 bytes
font_01_sfnt_off00010d06.bin
8d1b4035f57964d97efbfc0303ead88ffdbc520518de3b2508f4ee56ee9cdba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 16700 bytes
font_02_sfnt_off000138a4.bin
e5a4a8a0020a2f0ba29e44760fac282dc9871521cb28ace76b4cb2d82d43f4c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 10764 bytes