Malicious PDF — malware analysis report

Static analysis result for SHA-256 5231e01f20a4d1cb…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 02:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e878551844196b1888944feeeea64ab SHA-1: 5e9ff807161a368b7dc69840f6414eff49cb538f SHA-256: 5231e01f20a4d1cb0c27211f8fd6df735b568f9ea4f0fe6d39e22c21a5513f4a
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking on embedded links, likely for phishing or malware distribution. Numerous URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, reinforcing the phishing lure and potential for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crewmak.ru/uplcv?utm_term=streetwise+2+pap+price+2021 PDF link annotation
    • https://nibrasimansch.com/userfiles/files/nadewerib.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f295d1b97c---javidejitekoneponu.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/78021920919.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/sowujubamejive.pdfIn PDF document text
    • http://amandamaitland.com/images/file/91100491989.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bfb68377019176e17bda128abb2f597/fubusaz.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/puwoxijenasetudumiju.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/69647737726.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/43348823199.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160733b6b70b3d---90654628278.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/kitojejevimunigiteke.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/vomelojadinifuketatosaza.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd00a9609---29556584361.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/bavuvo.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982f08b9dab---44930083000.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16258662111786314576.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/51741891113.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/981211c60d79b89e36dfe97bfeac0ff4/bopabubisolowimu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a5e7028f8c52cbe8efd8c2011c00b044/furulida.pdfIn PDF document text
    • https://drlanda.hu/user/file/35133146765.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/67247839671.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c60d262ff1a---juviso.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/73e031d203cd45e1e9c3abd87edfca26/72998503530.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_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 10552 bytes
SHA-256: d802c4c9d267ea7fc9b56cb8f78d5261d49e0be2aeacb759fd73d944aaca8987
font_01_sfnt_off00010238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 16816 bytes
SHA-256: d69243a2c22d46e378e9c23bceabcb42a067c19979058882d696d8e6c8fc3c75
font_02_sfnt_off00012dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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