Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcfd36fd542eac4…

MALICIOUS

PDF

68.7 KB Created: 2021-09-22 10:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 07a1c44061a11a2f390b4dd621a4b329 SHA-1: 0d6b196e8d4d1fcef70e42ab2f190546a5f7aa93 SHA-256: 8fcfd36fd542eac4a14c949a9aa9c3ea4f5ebefa5db881fb87ebd08e4005bef0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file exhibits characteristics of a phishing lure, utilizing an image-based design with clickable links to external sites. Heuristics indicate it's a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm nature strongly suggest an intent to exploit user interaction for malicious purposes, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e24cea37e8---38150702213.pdf In PDF document text
    • http://klawiatury-foliowe.pl/_data/file/27762890780.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zujotagaralevure.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/lafupowezekumolasesalane.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/60533989114.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/weriwakuretesinisixo.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/23393956347.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/mobabex.pdfIn PDF document text
    • https://agatanorek.com/files/file/bamosafewukawem.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/220b7894d7b76ba77f0adc02031580b9/xerakupube.pdfIn PDF document text
    • http://aweibel.com/Photo/file/fupemaxexemovomibepon.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad8577a214---31253148013.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/31329527111.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/19061906672.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e942fd027f7002f36cc3e7f21155eab1/jagix.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/sadurilalogifibomu.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/32287920724.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/53105365299.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/65598852955.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/5be9b3a764c4f5516303947525ce51a0/4844838142.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210905_CEFCD62386AA772B.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/67423895415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=angry+birds+movie+1+full+moviePDF 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_off0000b1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EC 10888 bytes
SHA-256: 271824c285b1575652d7c3977ff44c57f944d5e9b24766575c5fc714dd78c8a7
font_01_sfnt_off0000caf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 13948 bytes
SHA-256: a0722316d2946ab0c43ecfe79c8a8cd122bdccdcace9c74100b7bd48a22602da

Open this report in the interactive analyzer, or submit your own file for analysis.