Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c102d885ade35d7…

MALICIOUS

PDF

88.1 KB Created: 2021-06-25 21:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30d244a8b3eb92dd87b10b5b3a2e6e03 SHA-1: 7f73f94c55d79755644a44dc103947ab6f311796 SHA-256: 7c102d885ade35d70cd266f66e0db4b295bc1632af66f487b1cebd5688fe5f86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised CMS upload directories and disposable domains, a common tactic for phishing or distributing further malware. The presence of numerous links on potentially compromised or low-reputation hosts suggests a broad attempt to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://bnbtravels.com/ckfinder/userfiles/files/74903543379.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/v6nmi7fplm9igop0pokl1r17t3/11540221335.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/965lthimkoc1hel9qecefbeqkp/88976794990.pdf
    • http://esistore.de/userfiles/file/13900639809.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd058859f3---pozawumuw.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607120c65b5c0---57607707794.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608319ee32f97---pegagewosimitubaf.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/01ps5gau6s7b03tpnflsankfm4/61087128205.pdf
    • https://tlproduct.com/userfiles/file/18272756269.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1720ae383---sabazikifavuvamuxilap.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0dc1a567---bevevuwifukujupa.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rhdi8o8mts455nmi116o74me35/95631331959.pdf
    • http://dajuicebarus.com/uploads/files/15412558356.pdf
    • http://csc010.com/userfiles/file/20210606181306_e4lx2r.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6t1oposb6pbh1q1r6osm49k67l/bunotuvudasupitudazaja.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607297496eb01---marozifisa.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/94d304b51262b0e4b6e3f92095f210bb/ramifiz.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c184f1ba1b70408ca0dcbfd13f1ebd9a/nonubepupasug.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f0557568ec14f650f93c97a7e1a90268/dikinoguvenuxuwefakewop.pdf
    • http://agcslohian.com/userfiles/file/texikemun.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9781073422---8987182188.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/716803a15a8c9596ab97cdbaec93eabd/wewefifevakaxoxafanedunit.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/desuvekipikesojelube.pdf
    • http://worldcar.jp/userfiles/files/36568299156.pdf
    • https://accuratesearch.com/userfiles/file/fujafokoguvepowe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hess%27s+law+is+based+on+what+principle
    • 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_off0000f2b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 16792 bytes
font_01_sfnt_off00010ac3.bin
e4639fdb3c7bc2e312995944771aecdf70d19e368fd466f985be1fe66c8ddbf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC3 17356 bytes
font_02_sfnt_off00013860.bin
9bb5a58e0b91d74d645ed410554da156c89045d99927453b15bb8dff9c2bcd94
pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 10860 bytes