Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2705f46c17bef0e…

MALICIOUS

PDF

95.4 KB Created: 2021-06-26 06:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae6394b164dd1a0bb8b858d783e56ece SHA-1: b0a7f1a1523a408cefa9233a38eff4fe17aa2567 SHA-256: c2705f46c17bef0e77faae2972759af75919acbb2a4d2545a45743434ed8b8aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to numerous external PDFs hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7619d21ee---datomolu.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072f98d4f4f8---polirofuk.pdf
    • https://monyetmesum.com/contents//files/11260892222.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/6732e48774712b6174b1fed4f754ac4a/monugoliz.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2df0319241---56724592756.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160be9755af1cb---barezexamekeg.pdf
    • https://aduanaldelvalle.com/userfiles/file/5192212618.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/c8d7250739af2be78276dbe755427c14/tuwedemeripetolukapuwo.pdf
    • http://martom24.pl/martom/userfiles/file/52072538003.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ce41bd68d726ff0971d208cbd32c65f/tinadakalumanomiluvatasil.pdf
    • https://clickkedai.com/userfiles/file/deleviwipepemalelajojoku.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070873b58ef6---dubefizufunati.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/juj211ga3do3342t0dhckuopk2/24437463402.pdf
    • https://retta-bg.com/userfiles/87609212219.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/16689980818.pdf
    • http://crmloccitanecr.com/campannas/file/sojezakogazedemirizef.pdf
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/87949886651.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd45cd664d9---rarufutimazadevodozixom.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/192f5c5cd7ab225ad4a5abad330ed974/lemagomoketujer.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a65cbdb87---vekona.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430035958200608.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753272bf846---pisunogamafudajobijema.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6190e22c---juzulo.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6397063fdbbca0153d43b2827beaef87/kopidari.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/2af770f1f215062dfbea6f3f85438eae/jamunapevasitaniw.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ed4b86716e4fc1b8b62ac0b75bdd781b/47739504626.pdf
    • https://cicadit.ro/UserFiles/file/57993406982.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=rhymes+free+download+mp4
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a0.bin
3569094a2d121ec726ea5e0e96041aa98e82d75ff4ecd3a8e4c21322b5b023c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10896 bytes
font_01_sfnt_off00010bc2.bin
8f3800894dfe7abe521a587cbfb852e4f0924d0fd2b2f8d46a13573c59fcefbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 16924 bytes
font_02_sfnt_off00013833.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13833 16792 bytes
font_03_sfnt_off00015044.bin
3ded9aaca2ef9e6c6e95cee9882111b9cda0db582afcb602817e0619031ab472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15044 18776 bytes

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