Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ba6879885fbe92…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 01:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43e387e61a92b2b4cf52eccc3a0c057c SHA-1: 933d46beca20ecb17a9dfb9b42701744e2781a94 SHA-256: 47ba6879885fbe92a56630469ed2b10822befdf689adeceebe051a9f91aefe96
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is unreadable, but the presence of these links strongly indicates a malicious intent to redirect the user to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/a54j546fcn03e2g6je5u0h55mn/xuxefupikepepani.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf93f78d72---41222008353.pdf
    • http://cartopack.com/Images/file/tazapu.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaa2f38303---jenuzakofibukagekuseze.pdf
    • http://akcjonariusz.com/UserFiles/file/japegasunezotapejibetuzis.pdf
    • http://willbramephotography.com/48403749986.pdf
    • http://firanywiktoria.pl/uploads/editor/file/vopemixaresebalomif.pdf
    • https://aokman-drive.com/d/files/xigilugozuko.pdf
    • http://standartbio.com/fckfiles/file/sagixagelorebobajegu.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082021430657---76607649394.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/98136080614.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/3b05b213120dd301444b61bce083e223/59671057915.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/51542502225.pdf
    • http://olgapolyakova.de/files/files/56023224155.pdf
    • http://adaviestransportltd.com/userfiles/file/difavimadu.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/fbfc5ac3537e22eb53d3c4ce7e610b03/52669086650.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607476721f4b5---zidafutupatezevawesigep.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//20917274125.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f3ca18b5cfb694359b4b2254da861645/63680181544.pdf
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/mamapujadeked.pdf
    • http://sashtraayurveda.com/ckfinder/userfiles/files/tezovekuvumupifivosux.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/18291301706.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/1n9c112juq5ijspept31083bv2/53721929143.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/4010717203.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/pavojefewasutufowil.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c665b201e51---6649483487.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/45b35ed7734967b5411ad02935690b6b/2112335308.pdf
    • http://fine-cottage.ru/userfiles/files/guguxudobediko.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=rosemarie+tong+feminist+thoughts+ch+6
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37c.bin
88c80e6bdcd011237e998ab108d7836871486c8541468f75ba02c992aeb36c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 11052 bytes
font_01_sfnt_off00010d19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D19 16792 bytes
font_02_sfnt_off0001252b.bin
b3fa45143f4d0a3207fb55a63e31af8b1560fb5ff19cfd028672565d0245fb36
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252B 16664 bytes