Malicious PDF — malware analysis report

Static analysis result for SHA-256 96557003573d6fc6…

MALICIOUS

PDF

82.5 KB Created: 2021-06-29 17:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f34138a6f6a21f4749e34fc1bd4296ba SHA-1: f62db8fc45bca8ab29618bc4ef8ddf583a82ca8f SHA-256: 96557003573d6fc659bc403f64a8542670fdff1a4a9288fa2e26270bbca29e4f
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', suggesting a phishing or trojan delivery attempt through these links. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d01ccbb34e---20116273975.pdf In PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o0ggu9t2t786p30hnebhtd9ig0/54332037745.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/eff19fa570e12d384133ce56a633d579/67857273981.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e4e72811b---giruxonagirirugakavajefo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/6b8e13765a0c85bacd964da9ba9d88ad/21586438825.pdfIn PDF document text
    • https://ubranni.com/uploader/files/jikubipaluz.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1565ddb491---vesufepuvefuriw.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/gikaw.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b14a7e3e462---29447079572.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/jalawinopujak.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/67880768709.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd649a8c82---fusapazananevewon.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f182c4b5cf---45802325235.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/loduxibatiboromofifawub.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/46244133258.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/zabinepumiwotegijozadude.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e955ea29f4---topanasebolalaladafiseli.pdfIn PDF document text
    • https://vestol.bg/files/file/jakafetumipuxibodo.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/butetigeraw.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/24287345144.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/lajeboterikodewaku.pdfIn PDF document text
    • http://klpa.net/userData/board/file/37004436809.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/42342948122.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3643b9d51---vegoratutaxoxunem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=car+seat+recycling+near+mePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 16904 bytes
SHA-256: b03a139bc365b2c612aa39373ecb4fa093714975e25d72825970c442ed229368
font_01_sfnt_off00012d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1