Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f5ad964974abe5…

MALICIOUS

PDF

119.6 KB Created: 2021-07-14 06:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 955dfcf305cd8fd1ccc157afad5e8b5d SHA-1: 0c1591f6ea4ddd4a3c489b85c2c6cb5d0470f477 SHA-256: 56f5ad964974abe571906de92a687fdef19d419e4ae77e013cf6a59a73008e8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0ea4b591ea7038989141ac5712af3be0/jogididexiwowiwiziporol.pdf In PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/tikazatozagewilo.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/kdjn6e5gt7eivucjfftfrbss32/3963527902.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/87823613814.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vte98ts7ge67ecc5noeh9iq3j1/65620481909.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a15b7c4e3f9---88040120439.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a1522f59711---divupujin.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/fotomojadigemiv.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/53056192279.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/30b3fdebb7dd55e824a788a0009b1b32/satujuvizogibebuzovaka.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/nokufarusidut.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/18792014223.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/zulemujemejevebe.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/52006327441.pdfIn PDF document text
    • http://isvpro.com/custom/files/ridejuk.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/a6eb1b9d8e8e0e4a5ecab59f7278e61e/81351075951.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/71ftl2k00mkc72nh6dlr2i2rv2/fusodal.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/vajotinijogikik.pdfIn PDF document text
    • http://brukbet.com/user_images/file/26649361091.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd98479ae0---nobewepik.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b446da5f47b---4463449584.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b029a59a2ea316c723688fdb5b91dfbf/nevejudunupaterixisediwul.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079af2e11e67---remajogazosonemifejow.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/810e1dcb4c0b47ea850307212e01b2bf/leberagaxanijabidid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=coming+soon+tamil+meaningPDF 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_off00014801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16018 10380 bytes
SHA-256: b5760f295fd759ac8d14b1617861c7a29f88f476f66388cab4e04100eff02aba
font_02_sfnt_off00017790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17790 17220 bytes
SHA-256: 6303117da8010816906dd0109800cbfb27b6b1b2e1be32bd35b601a6c3510ba2
font_03_sfnt_off000190a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190A5 25420 bytes
SHA-256: 82bf2746a7aca87f905d21928360439d05e58dc0e4fd248b63854dc43b352147