Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ee7fb6081d0f48…

MALICIOUS

PDF

69.2 KB Created: 2021-06-30 00:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ffb9d17b872147c2b67af7cea5e716af SHA-1: 508c204d2d1a4d7df9ac57fdb88390d38478790a SHA-256: a4ee7fb6081d0f48972a774a24a1b85b769ff27644f8d1f1f518e807f49cd093
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites that appear to be compromised WordPress installations. These links are likely intended to lure users into clicking them, potentially leading to phishing sites or further malware downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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.
  • 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
  • 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://drafthe.ru/uplcv?utm_term=80+music+quiz+questions+and+answers PDF link annotation
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d3231bc17---dipazepakimulagomivikene.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1240a98bb95f876f7c3290f0255bdcb8/5666943485.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/93224669799.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/92980334635.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/zojadamaku.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/73342777411.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/xeroxanuruxeme.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/sogevibosedanosiguve.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/0d896c2bb9909e64fc7742c7dd1ae12b/vokaposez.pdfIn PDF document text
    • http://blueyee.com/upload/file/111423187155.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607148f0ef920---1909942216.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/2683a16dcbdf25b71b0b2f5363d56d74/bababonapalivuvad.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/vemugekitojaxoretarovot.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/tukisutenabarenogopaze.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f06bb684b8---90577208814.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce1f70717---24309394767.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/d538muvv5lu80769keiuvprob2/xoragafuvumaxeliparo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8117d1f60a572c6b821bee90b33e097c/3591255607.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99a7c74112d9ae8ec3f040b811964301/35310625270.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/jidubogutarodajeferafolot.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/fb4de5e412373ea3aa08c61506e1fda6/bukeburujo.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/vununivepa.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/fj0q2brvh30bh4pfogd1ocvit9/jopanorurewiguniderivuk.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/remagedipewurubolaxozo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 11108 bytes
SHA-256: dfe10d29adbfccd4fcb0ad0d782c716d5410a122c9e2a671a5734286ccf9e6ca