Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b381eca296fc5a…

MALICIOUS

PDF

67.7 KB Created: 2021-10-01 09:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ca62d759e75a2fec20550eb9eb1422f8 SHA-1: 0ae5b5d67110b10b0b8ff8451375948b92a70f09 SHA-256: 32b381eca296fc5a224b4a739266368d14f85cd5418ee979b4cdd44f4f3979fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking external links, with many links pointing to compromised CMS uploads and disposable hosting. No scripts were extracted, but the PDF structure itself facilitates the redirection to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161441f93408a6---vuxuvisuwizujuvobove.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/gnqab0t27vosfgt7n4m4lvr214/natuzediguvotetotarifiraf.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/106670697361451bffb361e.pdfIn PDF document text
    • https://chp-travel.ir/data/file/tefefi.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16152006d7ffe6---rokak.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/baruvulefazadapeja.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/26656006268.pdfIn PDF document text
    • http://recviem.ru/img/upload/lanoja.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/99646766885.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210904180655.pdfIn PDF document text
    • https://betsin.org/userfiles/files/50740149917.pdfIn PDF document text
    • http://askaudit.ru/price/gawawame.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/witodenidex.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/xofodifelinusakesikasura.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/69525421846.pdfIn PDF document text
    • http://whatdwellswithin.com/file/zegakorejaxugupa.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155c3a5422f0---60276828886.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/diwekezev.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/6c181361c8307435c639e65e4e1e09fc/20880502011.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/ratanexu.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/91765112164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cricket+19+download+for+androidPDF 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_off0000ad5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5E 14324 bytes
SHA-256: e12387c997beeb64f3cc313780df9571726aeea0ea686de575acdef3424feb2f
font_01_sfnt_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 10732 bytes
SHA-256: 1e6a18b88d55d492d7c5b469bd0645d3e744244aebc172ef5ab15e8e97955d71
font_02_sfnt_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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