Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fceee801f77baf…

MALICIOUS

PDF

100.9 KB Created: 2021-07-20 12:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5369dbc468afdcf9a059188654f3e7d SHA-1: 14aa65108df3fb5bb2a895410595a4e1387fb73f SHA-256: 22fceee801f77baf18f30a6305668221286f986889d153677aae29f4366d4f5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ydtmuhendislik.com/ckfinder/userfiles/files/35503015030.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/941d6c1719e39c806ee2f1c43ea2f0d9/mabutagadavejimofe.pdf
    • https://palcev.ru/userfiles/file/87927372446.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607115ade66b7---66690000438.pdf
    • http://alpha-cp.com/userfiles/file/jesomex.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f4b1875b---barazijizeg.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/942a07e88382ee5bb0ffed2e111e2fbd/kuxafomisiwixen.pdf
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/pumitasuzafasedape.pdf
    • https://karpzbeldowa.pl/uploads/userfiles/files/wixeju.pdf
    • https://myarchitect.es/ckfinder/userfiles/files/dupaz.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c42ec9586173677c105358afe980d2e2/62999042610.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607257b479e98---3210480001.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/5pf2jm56uu0bkclb99cvfoukt3/ludafofud.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f33529ee79---99635618533.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084ad92bb7c2---90575502026.pdf
    • http://chandigarhdatarecovery.com/files/file/ziwubasag.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/43jpkbt0ngmto7k54qhgal7aa2/49659614612.pdf
    • http://doggystylzgrooming.com/admin/photos/file/25697015605.pdf
    • http://decaldankinh.net/upload/files/legagugagatejobovuvabiz.pdf
    • http://jcbcharpentebois.com/ressource/site-image/files/xojodaxebuvomigibo.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2fafaead15fe1393aa247acc0b70e1bc/filakelosebisevajasep.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af5685cf209---beruwemidax.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ad785a9018c2b9420b5f943f60635929/rijozuxoruzijavi.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942479af5b0---wepipidezajumepap.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094731fc8942---27038653405.pdf
    • https://andrejc.si/files/file/xulesu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=grievance+meaning+in+kannada
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f4f6.bin
615f3081cffb5627b04be1bdf7724f5bf82d2d31ad08e007fb12f8fe96ecf0a8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF4F6 21872 bytes
font_01_sfnt_off00011b6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 16792 bytes
font_02_sfnt_off0001337f.bin
191ebaf4dad134b9b6c38b3a80a37a2b751bb052ee5516f113239ff36dbfa4d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 18620 bytes
font_03_sfnt_off00016484.bin
89a2d1889457c473d879a8a60e48755300710f184174a56d1bf1c6afe108b8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16484 10480 bytes
font_04_sfnt_off00017c0e.bin
c7e7d125e82ceae927dd20a3878939955b4934ad90e0cfe7997f0c24e50dabaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C0E 1968 bytes

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