Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74e2a1afbb7b38a…

MALICIOUS

PDF

68.1 KB Created: 2021-09-28 07:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9874eb56a84ec0d45207d8e2b7002264 SHA-1: 024ce07002c1e46caa936b9768d42e0b0b0eed91 SHA-256: d74e2a1afbb7b38a0d348b94cd907ec237966f2d78ad405bbe9466a0956026ca
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a full-page image designed to obscure clickable links, directing users to potentially compromised websites. The presence of numerous external URLs, many hosted on what appear to be compromised CMS upload directories, suggests an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://smidgel.ru/uplcv?utm_term=top+10+music+streaming+apps+in+india PDF link annotation
    • http://kleinschaden-expert.de/userfiles/file/89375711537.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/pozisiwipovesegi.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/giwotuxodekewedelib.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161523ebd9cafb---22271248447.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/11653063254.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/23374064134.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/xugazegoduzire.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/43f801549abaa8ead517c036fc97b399/38748824583.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/43892598867.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/botopomininobirix.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/52810182045.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f4e806850---11009554238.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/74461245327.pdfIn PDF document text
    • http://aven.su/userfiles/file/sidakidotuzifotusadat.pdfIn PDF document text
    • https://scalping.ir/data/files/file/depuvijuvo.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/95653327194.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/tivitokurek.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/dulilevakofaporabira.pdfIn PDF document text
    • https://nesselaarbestratingen.nl/plaatjes/file/11826813037.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/43643388728.pdfIn PDF document text
    • https://kopari.hu/files/file/veroseduxorimijut.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///91892280366.pdfIn PDF document text
    • 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_off0000adb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 14228 bytes
SHA-256: 41c2150ab6dda5f2104edb1e912be89ca3122caddb25d92de9b4f767ca158e57
font_01_sfnt_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 11048 bytes
SHA-256: bec2aed72368708af97510f1ed06fe454d181c039a3e98f3aa83e5e3ef029d0d

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