Malicious PDF — malware analysis report

Static analysis result for SHA-256 3382a4e82eb63ae2…

MALICIOUS

PDF

118.6 KB Created: 2021-07-01 22:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 590e2e9daa44c63689d87ccc902785c2 SHA-1: 7a038deb5ae1ae77d1a438f4a2ae21feb0e80006 SHA-256: 3382a4e82eb63ae2e0ec3467e9c25e4222c76d42c36f3067bf413539ddb259fc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes. No scripts were extracted, and the document body was unreadable, but the heuristics strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9234

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://fashioneducation.ru/userfiles/file/79762317724.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/97248125698.pdf
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/faselelegutezivigilugob.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b998a05b80---bifitedixoludetaxogema.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea609053f---pevokugosimu.pdf
    • http://erex.hu/upload/file/fepemesixubevepejidaxevu.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd30f52d56---kuvexiz.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/iq7n4kdukjinpq8ape8l4pml2m/jiridawasakepawo.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/98254a9a681f091a65172d994098553e/83887538090.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/ranimazebazoxezow.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eccd4670b---1404309040.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc74809b5b9---dumexidegonuz.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/kiv87pklvrtq8rq61t2m0bn4oe/8600572375.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c55097a398---7521943996.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0e934661---34389849465.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/964bf93a25f96c979b8ece7cea70bde9/sejuvapurixikifeza.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf6319732---60056468186.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a27f82a1b27---pivipiramosob.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/fcc262b6f949bd5ca538df070649923f/gelovila.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26341b612---ragogotovusilumuzixoxele.pdf
    • https://menlopark.com/wysiwygfiles/file/47498350812.pdf
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/74601943969.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/2b14309d73b46fc26493ef9262b30e0d/gafebomawipupukoruviwebes.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082cd7a23e22---98912321164.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d5ce826d3---ruxofenusega.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=illumination+meaning+in+english
    • http://e1pl2.nazwa.pl/busy/fotki/file/rukifovobore.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00018416.bin
ce5184a6ef46f6203c5175a3a35585e92b3c9b7e984bdbe00c33965310b1919d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18416 25096 bytes
font_00_sfnt_off000103e8.bin
65dab8dc64405941b00170f8ebb31ecbc917b57dead55fa1684f994d0e9dc9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 31192 bytes
font_01_sfnt_off00014c6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6D 16792 bytes
font_02_sfnt_off0001647a.bin
aa00cdb11e27c2fdfa10d253fcf5191c98db909282393186e3e9bfb04f6c224b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1647A 9580 bytes
font_04_sfnt_off0001b2c1.bin
0ccf12e1643f78d96c2266de4ec2ac309d9231ca9d0abc021268e6738a05284c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2C1 10504 bytes

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