Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa360871c5fb0ee…

MALICIOUS

PDF

95.7 KB Created: 2021-08-03 00:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 13ec61cff76c12fec0dfa9db089c8953 SHA-1: a751dbd3f6e35a0b01e0d22f6af4da917b7c2968 SHA-256: faa360871c5fb0eef55bd980e59e3b7838517413e9781036690253381ac36344
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload storage. The presence of these links suggests the document is designed to redirect users to external, potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/xafukavunibuferobibene.pdf In PDF document text
    • http://terezmisszio.eu/files/file/nepekadu.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/86815803292.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/tugul.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/41883140257.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858b81a901c---fadobozatusi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609303b40a765---zudoripiluranupevofujoxop.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098acd5efd76---47336196071.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/zutopuzowo.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/nowinexesegevuzikadanag.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/gabizexifupaxisod.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/fagokedodamivebifimuxob.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/15567191481.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3e40bed12---tozesuroxawi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/36n0nsrj2k7hku7lhf91f9coc2/vijakizujusezeb.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/msn4h1c7b29kbbctk3li555af2/movigasibagiled.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/20673204388.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716ea4f13a0---91417815907.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/18313463297.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/dowulovafejew.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef7e2ab31---24622832829.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3a5586a2df07cc014e35893eb86ff893/23039748255.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6b687e8e4e03cae579cb62a0d2b0e652/2207382014.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/fubijosomatimavedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=faire+pousser+les+cheveux+boucl%C3%A9s+plus+vitePDF 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_off0000f6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 10904 bytes
SHA-256: 28ae6193cb77d1c18b3c873ea107c0e90bffa4f07dfa2f6c28261b450ff2c98b
font_02_sfnt_off000127aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AA 16784 bytes
SHA-256: 0fcc0bb0ed361dd96f1a7c66a804fb0a8c780befb0e8260957e4ecf071801eef
font_03_sfnt_off00013e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4C 19260 bytes
SHA-256: cd58ee0f96f4d5df0cb5a9b75a35f2993092c497a7aeea711ee23fab1eb36414

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