Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6872520804ad04…

MALICIOUS

PDF

75.3 KB Created: 2021-09-02 01:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5e81be0d68a427a0ad8b930fe3811536 SHA-1: 7d8ad3d900561ba4c6a0111aaf127793a96f5628 SHA-256: 9e6872520804ad0462ea9cb0be64cb01f3d2f7a620ea70204a0ca61be1a8073f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly indicate it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://atenngo.com/admin/sites/site/documents/zurigelixurukogosekafaw.pdf In PDF document text
    • http://penzion-u-zamku.cz/files/file/gapivivizuxutit.pdfIn PDF document text
    • https://nilsagame.com/calisma2/files/uploads/jigijaxovewogivuvejuni.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/64548986991.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/33454726991.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/52334532739.pdfIn PDF document text
    • http://prota.ru/upload/files/nukusewufazobowakenafu.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/21161a24a178c4f5c9b9a09b5f85333d/19454901749.pdfIn PDF document text
    • https://songhongresort.com/img/files/dibofelapuloteli.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e3acabf39f7012f607415e06bae14fb/2619642789.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210729151411.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/togowirikesivupaxixib.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/23785912338.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cbdfa27ec7fe55e6ae51586ba203398e/65410590817.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210709195131.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/gosawemojiju.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4fd04e63---datugulidejuga.pdfIn PDF document text
    • http://capri.lt/userfiles/files/rorabebusisapirovuwinin.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/46560390548.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608670af15866---dewumozoj.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda2235eba7---44613885735.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/serokebanuwagabimusimuv.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/xalarijutubomigo.pdfIn PDF document text
    • http://fotossc.pl/_files/file/tukarawipova.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/zuroga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+does+camouflage+help+animals+to+survivePDF link annotation
    • 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_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 15912 bytes
SHA-256: 12b92c3eb4961bff10793e830c891658e02af9d46ed26c192db8e6062d259180
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 11312 bytes
SHA-256: de895a6a6003d2c03b767e272c79f16ada44b170cbf4143714bf92ed95eb1aad
font_02_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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