Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a8e86dcb71c593…

MALICIOUS

PDF

832.6 KB Created: 2021-07-25 19:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8587926cb55ab32a9a7aab6dc6a751fb SHA-1: fc3638a208fe3ef5fc2a5c3e103887b5509b266b SHA-256: f8a8e86dcb71c593124e3e9cb1ab0a3b742eff36808c2efff6f0539b5b54c470
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure itself does not contain readable content, but the presence of external links and the ClamAV detection strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5346

Heuristics 5

  • 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.
  • 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://ipceurope.eu/assets/file/fonubefe.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fc2419998fbb7ebfbaa7095c40418ce4/vefosizi.pdf
    • http://nessium.fr/userfiles/file/zanajajiworugogemigid.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f019d0a130f---nurebelape.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ce43dd8b9---25053182599.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6357cd48fd1ed395fd01308eb99fd896/80830285368.pdf
    • http://andlupa.com/userfiles/file/53469954129.pdf
    • http://pogotowienaukowe.com/Upload/file/xadogakawapimoxezazixug.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/f19779b359738d89a4e6ef1ed480816d/52421740129.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be314861bfe---nopujadewetopogeje.pdf
    • http://lucchetta.net/userfiles/files/xinijokedegalosejezuw.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b3ea2214---28764958560.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/thbttpe9ui2ijqffc5ggothj36/zomibox.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/dec477f03f86c2b73edec47c288fc254/5470444903.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/ed43c548531c58aa648b2521f162e19e/3704295676.pdf
    • http://ngnjl.com/userfiles/files/goxiko.pdf
    • http://www.srijonihealinghome.com/fckimages/file/8929732047.pdf
    • http://cjandjunemillerfarm.com/clients/75830/File/mezerakufuw.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0c4d4edac8b778fc217487535f5cff82/mebewadojamakunotexe.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b5e50b94---buwol.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/r6uj8tgr6iqbgl36jop4920pq3/pezexijoronexilukav.pdf
    • http://15449010.com/FileData/ckfinder/files/20210714_C20FFB009A6C99D6.pdf
    • http://anhbanglaw.com/userfiles/file/vowivuko.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/9d0bba45292c5878ad5d349165880c2d/78400473444.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/69ca43f5763e9c02853ea90daaab6aec/vorugiveze.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/cdfd099f8252966575dbc17cbcbf4c6e/sazavejalafagimi.pdf
    • http://innovatepc.com/userfiles/file/3586820955.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+summary+chapter+3
    • 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_off000c8f2f.bin
6dfecaea761f27f52f8afaaba4bb81f58566b54f8c5b1783f1b935a344f1090f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F2F 17324 bytes
font_01_sfnt_off000cbc3f.bin
2ad1020c27ef05b269975eb7d49903b801105b2f51c895b3be5043bc2166d624
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC3F 11584 bytes
font_02_sfnt_off000cd72c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72C 16792 bytes