Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7c7e2b84c95abc…

MALICIOUS

PDF

86.5 KB Created: 2021-07-05 17:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 107c7e16dcabf524fe4c7399de66d4a1 SHA-1: 02d0276cd8a978ed751105623086cd7e667cbfb4 SHA-256: fe7c7e2b84c95abcf311effef99f89ae1db85f64988916c5a9382bde63b29018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95' and ML classifiers indicated a high probability of maliciousness. The heuristics reveal the document functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites. These links likely serve to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/rd0k3heu838q8ktt09nq345dab/wovuralupesa.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084b899b09cc---mizuromot.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090e4b494678---kuludejuz.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0af698425d---pugonadezuvo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b09a6ddb---10744628462.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/xofepugimexu.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607424e80314e---88342994188.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a09bef60d11---jolovikuposipanojodoris.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/63907404640.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d857842e6465f5a03edc521fc36953fd/pejivixagodamavazewepufa.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/97789028648.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984502c8f33---muzoxidirol.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1f53d0c8d41739348a60f367934577f6/9315954399.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/27320107285.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/64936725447.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/zoton.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/87334803531.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/55938092221.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/b4c9e8def5d3bd429a65cad63ba6e61d/lupaxa.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608496305bdb7---beforolifoxevalufo.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/49959360972.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/fesokav.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a4b95442a68588ed6d5230c710fa3622/6249184983.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf136f0a324---nepenenex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=tingling+in+legs+at+nightPDF 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_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 17908 bytes
SHA-256: bd758da6868bc6f0fafa0bb06a05ffd665eaee263268b68fe2b00e5dbe045266
font_01_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10132 bytes
SHA-256: e7073011ce44b1ddad49ebe3c1bda3e28668a77dd8d24499b6b54ad7f27162c4
font_02_sfnt_off000134c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1