Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47564fbd63c933d…

MALICIOUS

PDF

83.8 KB Created: 2021-06-29 12:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c6804b25c3e4c588e2ed7d36526e9425 SHA-1: a294f0546ad5dfef759f6f671401bc37c7c90baa SHA-256: e47564fbd63c933d75b420709ff9bc7742ffec38c971059aa681bfc27729b411
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm or phishing lure. Heuristics suggest malformed exploit streams and a link farm on disposable hosting, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a646dd2f382---81013175124.pdf In PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/beb22b5ae4b356ece7b5d9deed74eee5/32410581314.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/93a8408edaa112098ab74a81fe99832b/porezesag.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da91fe1b599---ramar.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e59a6fae4---fevemuwepezezuzejep.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/zivasomebi.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/pijenikofefedetewedo.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b737c9f1473---22030558402.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7003e951ba5a46dcfb3d6b1c8aefc993/83637113821.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/h93ihl8pemiiuqhcmaqgsroot0/55818320540.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607838069ab03---xexekomit.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/15498488422.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bb5e15c7a2ffbc75fcc8d2dd3cc86bcb/90789390041.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/fikutatasogig.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/31682726422.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/mafozijakobabago.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/rewubadiganixedemefuzexir.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ub16llpjft7hjmb1umqjjbjqi7/10328440054.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/vixinaxesirubabe.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/613b58550ac48888e941c3cef5e4a304/puxisi.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2ea0ba8a06de1da7058a1c994e102a5e/93370602659.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/unsmuhf70nkbcauerko6a8l3v1/zivurove.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/g5s8at6sl6ei6b0p7hp20r9vu0/zixesurepewujuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=meter+table+chartPDF 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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 16876 bytes
SHA-256: 0570438e00ace51d1f7c5057a9bb984f7cdd0ffff82815b57effca95ca6b297f
font_01_sfnt_off000113d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D0 9976 bytes
SHA-256: 060b7f69e4108d9c91b5d9699d9a99d543e49978f0427a24550fc8c59ff7ee9b
font_02_sfnt_off00012a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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