Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2c5ed793bb9a88…

MALICIOUS

PDF

83.8 KB Created: 2021-07-04 19:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff11827b7d7e8088916a1ac9c5ca8718 SHA-1: e881dbfcdfcc24be12b90807d005bc1d87651ff8 SHA-256: 7b2c5ed793bb9a885617d9b66b078fa2123f90aa34e3ed8118d399129235492f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=the+transporter+2+2005
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfae80e65d---wafize.pdf
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/1538131070.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8f319db0910668795eb1d10cb1ec8941/45552704976.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8b2a2bdc31c6952f27932a3436cbd131/48123395836.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf7050acd5---12936432942.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2448fa9f2ad3105dd70e7fd120dcf588/kabalikoresi.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b084249b1ce---vurenofipugubijixetufenop.pdf
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210614_1EA8C4C3DD87D438.pdf
    • https://actorconseil.com/files/file/54509531968.pdf
    • http://msslink.ru/userfiles/files/53419840826.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/nunobopuwewagafakalafade.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607865ebde081---pagasuzubepuxolisimimade.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ad2f4dddb6c75a28606033f48cfa7c58/balififimije.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/rfhtu8qfg1nk86bdmuopq8nu65/26865364455.pdf
    • http://hysansam.com/fckeditor/userfiles/image/zijorisaxegefez.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/bdnhplmh4gjr5gslgc64prrv77/fuwarom.pdf
    • https://bandai-k.com/userfiles/file/pitegejumuweliw.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f762720bb8---lepapupe.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/507744b3e543e2d36eeba94f9e4e8c26/zepekaxakopaw.pdf
    • http://www.sport-konyv.hu/userfiles/file/sinowuwusisagowi.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b64dd02055---fememo.pdf
    • https://samsungvrvklima.com/upload/ckfinder/files/74716189708.pdf
    • http://terezmisszio.eu/files/file/92117594915.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba33b11e22---sarorup.pdf
    • https://tenfci.org/userfiles/file/4801726406.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 16792 bytes
font_01_sfnt_off0000f27a.bin
22692a68b847bc9c734b19193357bb18d09fa6e5ef5704c2bdaaf68e50d5e6da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 21956 bytes
font_02_sfnt_off0001286b.bin
a8a2564c11c549812c3265f971dd82283dff9d0f4b008e68cac298d968f1f063
pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 10548 bytes