Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c62d7295054daf…

MALICIOUS

PDF

90.7 KB Created: 2021-09-20 14:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3d53d2e7c8621d8d8906ae82324a6143 SHA-1: dac9e4fed89d9c112be9e93f29802faa3bc9786e SHA-256: 95c62d7295054dafb21b7b3487b95f89e97f0cb7748648e9dc3d9295f2625940
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to distribute further malicious content. The presence of a 'download button' lure reinforces the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://irlanc.ru/uplcv?utm_term=maggie+ryan+oet+speaking+pdf PDF link annotation
    • https://unitytradefze.com/ckfinder/userfiles/files/27505784370.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/fukakure.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/soposifogikexafegiz.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613432cef20a0---99237685611.pdfIn PDF document text
    • https://viettrungson.com/media/Files/2226511785.pdfIn PDF document text
    • https://limadelimon.com/images/file/1063181846.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/fefatataro.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/susifome.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/buzub.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/fekokabujaxani.pdfIn PDF document text
    • http://trivio.it/userfiles/files/6366124212.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/62699185659.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/48754085731.pdfIn PDF document text
    • https://dyaa.club/uploads/file/41782704136.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e9a30f99476e2ffbc3efd0b5f0858314/xubotodubunurodepime.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/lozeparanafow.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/31001404674.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d49719e2b---86464038535.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/59495447318.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/nuretovamabejufaxo.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614697db8534b---40354442999.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/67316686389.pdfIn PDF document text
    • http://houselandia.ru/files/gejogawexazo.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/21331983063.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_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 19088 bytes
SHA-256: ba92737af9d0ab3472fbce451dfd931695238f226b18ac56a0b8fd847d9a1a6a
font_01_sfnt_off00012bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001440c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440C 10824 bytes
SHA-256: 455a850503263ab97d550ef8f791a4e00a342bcbc863ff5bf59490038f335479