Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98e69469cced52c…

MALICIOUS

PDF

70.7 KB Created: 2021-09-08 11:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3a5f7bf8776e4df61210f513de6a222c SHA-1: 795e8f9443f0e401d12f78e878551b413f30ffc2 SHA-256: a98e69469cced52c8724852a65eeaad29e04c66dbb917fb9c5f51289e690dbbd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage attack designed to obscure the ultimate malicious destination and evade detection. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs indicate an attempt to disguise the phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4718

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/507a65371c6d1e90e1178647f4a6be57/mumenakokaxolus.pdf In PDF document text
    • https://infiniteprospects.com/FCKeditor/file/52323511356.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/0cm2kqfm4rot5stim2cuhaiv04/ririkefavu.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///fikigejatezum.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608639d5b49f5---bumuvit.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4674e171d---69995480675.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab7a8bf5f---bapana.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb54e38cb3---tigijoxedarogek.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/70sujh8fpre4omaojg9rg81th2/65749871355.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/58507434797.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xojokirejubapoduxilumaf.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/xemanurumimajeradedise.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/13045088627.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9d375e22---xonafumazotok.pdfIn PDF document text
    • http://web68s.com/upload/files/begifigexobujesuwob.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/71524556598.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/texanaxikutebo.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f789d7c3d---fonepegexawoxizexebadiku.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/91875613720.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/78451586832.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806b7645171---guzeruxenoxibetagalamaxu.pdfIn PDF document text
    • http://enricobarraco.com/files/vegusivuxivimobij.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/dilozazowegagigexo.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/37338422814.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/tufatadususesaber.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5d0e4a5bf549e108744bf3f5f41300f9/88685793734.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/5621827601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=citation+en+francais+pdfPDF link annotation
    • 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_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 20332 bytes
SHA-256: 4b4fd1f7b158d40d4a363be0aef5b310a6c22889a4bedae7b0def4e3d16c5ae6