Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fd699299bf5e53…

MALICIOUS

PDF

96.3 KB Created: 2021-07-31 06:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ada4a49b7d666b2b2ab22ee35925969e SHA-1: eab75a09679dfafa3589c8d68366bd541c84f7c1 SHA-256: 54fd699299bf5e53c464ef61a625ef9119db20e4c68c31e43d20e1625c874400
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs hosted on compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c990ce5d595eb076b4403a22c066c217/najuvapuzukesiziwulijula.pdf
    • https://activepymes.com/pub/file/vabelowijidudenunuteni.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/8niq2cm2jqpq9fttrc5v2fp5s7/konagapexetoradamojoxita.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160be8c933a754---rutotinemox.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/29019442863.pdf
    • http://smflow.in/admin/uploads/file/64125682016.pdf
    • https://permargi.com/files/galeria/files/xoxam.pdf
    • http://bakineshr.az/ckfinder/userfiles/files/96004701334.pdf
    • http://detskaoptika.cz/ckfinder/userfiles/files/80502896154.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ccf4adcd85152dc318aeb481f872d389/xexoxokofasoxibobanetuna.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607220836c718---60244351094.pdf
    • https://bnbcostaverde.it/userfiles/file/16654220876.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd9abdc3e---linotizo.pdf
    • http://baheth24cars.com/ckfinder/userfiles/files/xevafatenofen.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d61b0358cd1666adcc37647124b2a39d/50758202115.pdf
    • http://canadapremiumlubes.com/survey/userfiles/files/gobed.pdf
    • http://akinmedical.com/uploads/file/81331791145.pdf
    • https://vestol.bg/files/file/gojosapexagegi.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/kpqcpnmk3rbqru4o5jjfa7dsjh/mirataz.pdf
    • http://esipro.fr/userfiles/file/98428499287.pdf
    • http://anhbanglaw.com/userfiles/file/dirivo.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766b30e4432---73639179260.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=f%C3%B3rmula+para+pasar+arrobas+a+kilogramos
    • 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
font_00_sfnt_off0000ecf2.bin
44c88801f41143e5b3698b667d7c4398fc7c2afa0b037f3838d032690ff3709f
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 16436 bytes
font_01_sfnt_off000103c0.bin
42b838bacb8c744fc1051bf7ed7c7ba0444b65beae3a9318f9af529c4a1350ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 3108 bytes
font_02_sfnt_off00011045.bin
b4c3eb73ca76f22e34564a379d858c0005a0017d1e15887b1a6e53d16faeefa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 18276 bytes
font_03_sfnt_off00013faa.bin
5d7b2f2e105572634a3e96b94595e34e3fefc59d6bf387b97cd60358e3a03daa
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 10708 bytes
font_04_sfnt_off000157bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x157BC 16792 bytes