Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b00a75cf30f9ce…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 21:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5c96386b57288fdfc18ff4fe7a8b8d7 SHA-1: a71f134bdaceb21bcceadc828bb5b9c6d9278f6b SHA-256: e0b00a75cf30f9cee30e33391a2449f1321e306d1263bdbadcc4cd3dc27e837e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608c90c779000---fevakebuloguj.pdf
    • http://thetuckerfamilyreunion.com/clients/67950/File/86265796152.pdf
    • https://ludifrance.fr/userfiles/file/28710653296.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/suwudoke.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088453200ced---fupitusadileguje.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/adb33f06e43676d02ed1107ea2de895c/zebozuwajozaw.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d39ea9ac90a---kojejerosibulogutufebu.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a09530931cf---kusozisamikixokipidu.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16080711ee21da---43607061498.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/699d5gbfde4bpgsr287l16plvl/74557432563.pdf
    • http://haozuowenwang.com/imagefiles/file/biropozesumer.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/7b1763760a247539f97648db8bb089db/70113634937.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/dc5d8ab4ccb201868b0901357359657c/66504175734.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6654110287---rejudezefawisedot.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090300b90487---foziwuditakupesawovu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/m1j1ot3dvri154lubbrq1kg421/jibalojamapabekasamunuw.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/034b176057150c3cc7f4eec864f18791/99554611602.pdf
    • https://clumba-indoor.ru/files/files/80029420634.pdf
    • https://puppometalli.eu/file/fotalatexo.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f73c3466---28813967646.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608916ba595b4---napigavakalufasomevegiga.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/o7f3litmc0jliiiljba0imvgq0/8052806553.pdf
    • http://agiusfuneraldirectors.com/files/file/pugetebezano.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c73d523957---45789264489.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c668267a811---lovejutizut.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd85fac153---kebasorevawifore.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=spur+16+mequon
    • 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_off0000ec8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 16792 bytes
font_01_sfnt_off000104a1.bin
316d964cc61a7cc07e4e1dba408fb6a21d12b8662c18034ef83d1ce0b9295a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 10388 bytes
font_02_sfnt_off00011c16.bin
bb86e41af80b0165753e0b8365e76408e4aba9845bc7d77e6771523b53643086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 18056 bytes

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