Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde7071d82e9ba35…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 08:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbea28286bffb8082bfa69696d253792 SHA-1: a7874f400e7946496d0e11845d9f58e8f66f2492 SHA-256: bde7071d82e9ba3546f47f072707c4fd5c743825d9ec622650882ab902b395c7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of numerous unknown URLs further supports its role as a distribution point for potentially harmful content.

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 http://amphorabeautyclub.com/campannas/file/nedixusorosudevesed.pdf
    • https://next-engineering.com/userfiles/files/51485288603.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d135552b0c---48796864360.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4235b7f854---netipovoligiwojufunogadi.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ovss062bf0mm1ktlonk4j7p7pb/xamofiwibisadug.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b545bf39055---11315642063.pdf
    • https://camgloberealtor.com/userfiles/file/71268195748.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b2e550283---gadib.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/168fac99a223045eb3cce9f6c83ebf49/wogilirapolelipizejazejaj.pdf
    • https://abugfreemind.com/userfiles/file/10824354658.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39b65d8f7---nugatatujipere.pdf
    • http://luingpyrex.cz/foto/Image/file/99339741262.pdf
    • https://terminal.hr/userfiles/file/27519068923.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1d81c3df6---jatajamanozuxorej.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5e2a5d2d84411d00dfe53e5fe063e3ac/96772025324.pdf
    • http://bmsorganica.com/userfiles/file/10372375008.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bab587c99---gekefipigoxal.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072dac6b135e---57542667897.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/797ba3e6c332f09c63c3180a8f7df9b3/gegekurezigure.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070396bb3b82---neforogixa.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4d8b9ba45---11922438898.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/tavorekusul.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/66ae7a68eb4a14bcd2f74e1b09e2dba4/zatabogamovufaxofezido.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b400bd09fd1c7ccac51ede0991acee66/44801759227.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/084c965220fd07e58e29b7a97ec1b3d8/pedusak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ribeye+nutrition+facts
    • 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_off0000fc54.bin
fb9504197827bf1d136bbd9e47886e142d784e185270b452bab865d518d469de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 10684 bytes
font_01_sfnt_off00011506.bin
fa369ca5212f5897279b4f8a0217c6eb299d42fcc7670e300f52765526a08c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 16408 bytes
font_02_sfnt_off00013fc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC8 16792 bytes

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