Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa049150484c70e…

MALICIOUS

PDF

90.0 KB Created: 2021-07-26 06:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 22185205625ae8cb67f45c302cce839d SHA-1: f8c342b87f1f0865e0516e27d80842a66a3169f9 SHA-256: cfa049150484c70ed215ac99815cd9311c95718f33955d3c1a1978e2bd70fc89
164 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 or disposable hosting, suggesting a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of urgency language further supports a phishing or scam-related lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hasyo.net/files/file/kepowexizivitelelagebeg.pdf In PDF document text
    • http://absolutelyneon.com/userfiles/file/dilazejazozurokizuvene.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/medenokogafebose.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b775259e---dimukejapemit.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/28616794185.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05abbb211a---xumelomibekasobizuzugimow.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c69585f5e---saladusapavanul.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105061349122710.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/91vvphj04jbcs8ocgl6h710rvn/kerojoduter.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6b957894---33139619961.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/51835449218.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608001e53e44c---29716577138.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85075bc273---gizeteboge.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/fb3b7c283d6eb7aa3977d4414b41a153/vidogi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160986f9d78934---nimefimuzusumafi.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/43850206982.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/756d1b0a212f1c37bd25adcb8d79a535/lugitowi.pdfIn PDF document text
    • http://www.heksan.com.pl/file/lofifowuruzud.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/febojerofunazoj.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7112a1df0---pomaxikisovixat.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/lufumozodejemesovowago.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/gadilexolilokilumovaba.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/gufadole.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e954aa92c---gopepefexibawobiziru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=undertale+disbelief+papyrus+battlePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 10732 bytes
SHA-256: b7f6baf819707eaddf6a6a6c800e43a85997d8a9daf6702be4d4482d069cc6fd
font_02_sfnt_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 18300 bytes
SHA-256: 5e5c0ee9ecb9b88e7ff183bda36b89c841821c315752d5ee98b90ae0ed040b48
font_03_sfnt_off000138b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B3 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832
font_04_sfnt_off000141ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141ED 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d

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