Malicious PDF — malware analysis report

Static analysis result for SHA-256 9463976567a73b2a…

MALICIOUS

PDF

87.4 KB Created: 2021-08-31 08:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 06e01a101119bab7f8bbb5122bd49d73 SHA-1: ac1ac87c765adaed353fa64bcdfa594fafa68eb4 SHA-256: 9463976567a73b2a31ef1df1a1c96fe12e07ff502ddcb781d2aac8106abf7bf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://am-assets.com/aom/magnolia/userfiles/file/nadeximixakano.pdf In PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609695e807b2c---mupagokuzazawor.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7ff849bc9---dikenaxuz.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/silogapowazefozenuzul.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xarixuvibelugufujifigov.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/7e83aaa51499215f872df968220f2ed7/26043799827.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/50552899952.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/jonodajo.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/pizowamiko.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/q6sba9cs90s3dr80kkrhndpus4/robati.pdfIn PDF document text
    • http://chinazzjx.com/d/files/julerukimuxak.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/samoliximifemokulaxesadak.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/41330662877.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/30973a67085ad25ffcfdd75a7b5a7bbd/bulaluvajedafapuv.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/cb6d7183690c0094d69fe551f9bf494e/tulezisusuxazulotoz.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbc52654a1---vawisofobamo.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc0e67ceae---nibiwovetulejiwaleforuvik.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742df95dc4b---tizugevexalujukuwobuzu.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/zezizuxovadupizon.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/kapagobomo.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/sewoxakojatanotiku.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210831062950.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/50173bc750c28194acc587c9bf506fe6/vufuwivisan.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/limaj.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/tovuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=changing+sentences+from+direct+to+indirect+speechPDF 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_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 11052 bytes
SHA-256: af12ef4dfad7c9f1a09edbc2963640bba2445cf28d3412a4a3702958073e1468
font_01_sfnt_off000105d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D8 18868 bytes
SHA-256: 860d60802d2c4819970308250a718fa316d7c1c48b024d1665c30ffd306d4e1d
font_02_sfnt_off000135c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1