Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d54fd47a4da388a…

MALICIOUS

PDF

96.1 KB Created: 2021-07-28 09:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9614cf9abb5b4a41eb158bdaf1fe9db1 SHA-1: 7f18127c83a394c95f945dc8dc708e7e6a91a25b SHA-256: 2d54fd47a4da388a9adbf3c0130178611281c2fd0798351162ac87adb37897df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS uploads and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e1cfa264c---kedivakuzixeni.pdf In PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/wuvimebama.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0fc4cbeb---xutevorusulipo.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b545990d206fd2aa6d6597d988388464/bobulobuzoteluzodasuvoja.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/81375142621.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/figudeputobeziragajivez.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/c7ul37vtmv2h3ialnc86upntjf/90271905153.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e851f304f---90365328246.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/ledoxudenufopinisavaruve.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/rotoxagafu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16079677b9dae5---xipamop.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/xidorejanefipifakinaxep.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/15406241861.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/d6fbe51744712311762adca6d1a7452b/42366791051.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0532867d---lavanogo.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/lijofag.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/kofixezuzuvewaroxetuxakuz.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf3d2d4c6---xinezewu.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/r3i5b416kps05rgk9tfrecrs4f/rinododibajexazapifelazu.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/67808216915.pdfIn PDF document text
    • http://waterreducer.cn/d/files/9955493516.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/vimixiribuvasabuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+position+a+wrist+blood+pressure+monitorPDF 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_off00011352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 10872 bytes
SHA-256: 465a819eb92ea98d2d834950a4851ab5a8afd7e0bcd23a436a84f7b1761517a5
font_01_sfnt_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 17296 bytes
SHA-256: 82ebb31c0d641686ee8b2bb06996dfc5ef679c51f373a50d84f6259784039d16
font_02_sfnt_off00015989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15989 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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