Malicious PDF — malware analysis report

Static analysis result for SHA-256 1192381268f909bd…

MALICIOUS

PDF

87.5 KB Created: 2021-09-11 20:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 580fd6225a1329bad4d87f5e8bf0d58d SHA-1: 47338a6fcbf388235d286d9626920cf346af249f SHA-256: 1192381268f909bdce145e0beb51920fcbdf660cf7f6458391f66bb5ff5fac41
164 Risk Score

Malware Insights

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

The file was detected by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to potentially compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'download button' heuristic further indicates a lure to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coiffurenais.com/userfiles/file/muxufumusamavokogifufavuw.pdf In PDF document text
    • https://silky.ae/images/bulk_images/files/39066099308.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210905172944079.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/46784429495.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/nepuzenodatep.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/jatijapawuwupixemowafabu.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/88420069628.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/48235364193.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372ea69fb44---nunejawesofadeveloxo.pdfIn PDF document text
    • https://cncunse.com/d/files/71826916686.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/823092eff8ff59cbf730ef355ec52070/temuxotijegofipala.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210910/files/20210910130019.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/68354175287.pdfIn PDF document text
    • http://rinsacars.com/files/others/32706552105.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/rakeziwukon.pdfIn PDF document text
    • http://cascad-trans.ru/files/88777112120.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/12594157777.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/48939876692.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/paliwovifafefon.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/kilebabewolora.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/gipivawoxafobumike.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345523c6e9a---diribipamawitumikuputul.pdfIn PDF document text
    • http://yanartextil.com/firma/files/4325654046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=a+praying+life+paul+miller+pdf+downloadPDF 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_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 18048 bytes
SHA-256: 4aa0d2028248f04b95157df770a32a356877b539ce4c72d219d007bc39c2dbcb
font_01_sfnt_off00011fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA7 10856 bytes
SHA-256: 357151a95008f8c6748b0e7ce37900769f0da2bc7812e7ad5e3ad90a35beebf7
font_02_sfnt_off00013887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1