Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0543a83527bbeb1…

MALICIOUS

PDF

75.3 KB Created: 2021-09-07 15:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6bb5acb9ec1c723fb727a4aaab88de12 SHA-1: c13c73a2d1ced7938808fd8a07724321d3c56355 SHA-256: f0543a83527bbeb11d514da867f3fad1fbf3ca1d3fd508b23d1cedc47fb13db0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or scam campaign. The embedded links are designed to redirect users to external sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=angle+bar+standard+sizes+pdf PDF link annotation
    • http://jiin-torng.com/uploadfiles/20210814001703.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/luzovukerujixamimiwopes.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/oc3v382s177e1i450fdjvu5pi1/84757356122.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/0vu2dbbgmk58bm5pl2423gp2eo/develevemover.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160855880ea518---48720425690.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/tedanaguxuzepagiten.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/muralidijajivodumolo.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/bfc4b8aa133f3c638407f8fe0ffba086/64087968069.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/pebuzupimamojaj.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/33621353202.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/81736848211.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/hcn12e8gksu46lbi1q52u0j2nj/sosaluxatode.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/f8363f51ec1c2d79ef262eb7871a884c/sometalaxipelolil.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/rojugibilebipe.pdfIn PDF document text
    • https://edgecs.com/documents/madakomekasafugap.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/9vueh9s24331vhspjpco71e9dv/9873663526.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/suxetodesugarejaximeg.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/86949046334.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/49596899615.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/11829512989.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c90e22361b1cffd954789079629fea7d/zedaniwujagupevezez.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/32611645256.pdfIn PDF document text
    • https://mackbeks.com/files/file/96087364249.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/fedowomatofowogewire.pdfIn PDF document text
    • https://festacontinua.it/public/file/52348168183.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 16432 bytes
SHA-256: f705aee786a8619aab3df3fa798b5dc2b285ad455773745213d7fe58b18eaca2
font_02_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 10732 bytes
SHA-256: 9004b70adcc069e14204ba686398a7af54e2ea84c17de3a10adde9f33c5d5353

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