Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc99d14eb5b7bb91…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 08:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 859369ad61f1e6d524f9f8b2e9080ccb SHA-1: 71e2cd715c2babcb8f92b37d27cea8971be2be81 SHA-256: dc99d14eb5b7bb91e72af7dd1238abf71982e2f85c51dbabd4476d8f741239ac
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, including those on compromised CMS uploads and disposable hosting. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/58499796759.pdf In PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/0bse31isqsn2qqckmb00ngsdr5/76571459107.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/72181129597.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/8509782290.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/rasifusovuto.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a812b51e475---35097549531.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/tonose.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210902_FA3842F165C282F9.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/xusixoxibaranaweji.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/75qqnnsvsgg183kk1jc070fr57/lorufa.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/68530067307.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/zesetumedemiwalowamepe.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608042489387d---mibavopo.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/48730008270.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085497265945---56611836943.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/37155388781.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aca1a61a537---taselozikakezopakajego.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/89174027180.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/40482878047.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/vibenazajati.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087440324e17---9062158333.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/gekukadizifiw.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e297cefad0---kuxinodematitojoku.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c93e1bdb1ded89c08821b020ba594e28/fizobugagukizuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=strategize+roman+pichler+pdfPDF 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_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 19388 bytes
SHA-256: ac840fc68abca1fa1e3d642461c434907608e1ebbf8ed4ad0c4a0d0c5b93451e
font_02_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 11032 bytes
SHA-256: 562cc1304da68f046f310a625ddb10f70d001b90b778e41d46464c56ccfaba76

Open this report in the interactive analyzer, or submit your own file for analysis.