Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a0d602a707b1fb…

MALICIOUS

PDF

156.3 KB Created: 2021-06-25 07:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9d560c0e43514d1f5b5de1b2d43cf0f SHA-1: bb841a8111fa3d4bd9e3f6bbb886dacd5198522d SHA-256: 95a0d602a707b1fb1cef50888a9af724bb09253c9368acf2ee2fa221a26f4342
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/og2k4r056kg4j4s858g00n3nr7/tizuzeregumopepidozasine.pdf In PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b958248d07d---bogafik.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/f0al6c520f0u44nqokas78l7bq/zivuj.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/205d1caabc3d0308cddfd847d3db75b7/limonala.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/080713086454.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/sefoxesuvepobur.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/875d6db488e29b991fdae8e5c0fbf801/24875333576.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/mepeluv.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/90466511275.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/79338185053.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/27989361797.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/robop.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9475a712c1---seritabokibumitijumudi.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/4qo8dpftm8mk8fe62og9j7cshk/samorakukejimogopuzopufu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/86944257426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mortal+kombat+9+download+android+apkPDF 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://scripts.sil.org/OFLIn 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_off0001edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDAD 3692 bytes
SHA-256: 0685d52fdcd79085d468d2bd1f19a8db4eda6328d6cc28636bc188c0c108964a
font_01_sfnt_off0001fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB02 5384 bytes
SHA-256: dcd79b76f56a5dea6d4f9295c60ba1f13e34361cf46f039fea90ce5498ea3eb6
font_02_sfnt_off00020d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D4F 3512 bytes
SHA-256: 560fb2bf50f3975268f696f03330eccedc759c5ee7af8ed05b047d86318a6776
font_03_sfnt_off00021b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B31 15216 bytes
SHA-256: a2a39838b070c1cab1a7452e3fc9ea2b7006193fe6bca3ba95e0b3e77890a19f
font_04_sfnt_off00024b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B7C 16240 bytes
SHA-256: b7c6638120b9bbbe47e19ebdf19e3adc5a4deea7fd770e42e66027948c38bc6e

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