Malicious PDF — malware analysis report

Static analysis result for SHA-256 d212b3523e651b7e…

MALICIOUS

PDF

88.9 KB Created: 2021-09-01 17:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa4c035fa31d1e48059c6e3d7b6e9771 SHA-1: b043a279b706199fc17d80e209da69f18f2e9305 SHA-256: d212b3523e651b7e298ad3729a1b47abb7bf78e8ab3fbeceb947a22ef5fa3270
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to a variety of external websites. Several of these links point to compromised CMS upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://www.masozilina.sk/ckfinder/userfiles/files/65701021817.pdf In PDF document text
    • http://bogelaipigeon.com/upload/file/kedojevimamotolovelorip.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837d6804569---welubowiwuzuvugo.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/jirogifotuxule.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e99df1cc9---pijosa.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/nudadajusebemomixo.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6ae4f024a---jadokixotoxutati.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/25596284579.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/96434301888.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/o2vpdhhvgh8494e48mg9klijmc/wawawanezobafejasaforigif.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b56a4ac5---xevukixakemafixanojixu.pdfIn PDF document text
    • https://unaizahic.com/Files/files/napiza.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/bofekemazaletanasokosidak.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c940e9bd5c6---86251024126.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/vorumikapeleniforikosa.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cf83ad962---64507772840.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/mekumorexovibilezo.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/48184913677.pdfIn PDF document text
    • http://jonme.net/ckupload/files/biluwagilasikemusu.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/18214967701.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/jirovegesukebe.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/cpo7j9bsbbc8ohukla587ms256/98748001481.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/4678e5eff5cbb72f1ab6ab182b3be1b5/kozuxosavezoti.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d02d1ad145---76536742989.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160720747adeb2---kojoxetabudokopafebufuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=is+giving+birth+the+most+painful+thingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 11064 bytes
SHA-256: 66ab72f9220f8a2edbe683bdf177f8f6e40498e10a9f2cac67b3aa3987ab290f
font_01_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 17656 bytes
SHA-256: de660534ef640b381f234a57b80255da7998e96008c50435c52e535be02559b0
font_03_sfnt_off00014bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF4 2020 bytes
SHA-256: 95f17543879737f67dc58bd3f3cd24b7e6755773bd8f3c9bbbfd836e1b3074d9

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