Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2ff6b0ae45b934…

MALICIOUS

PDF

85.7 KB Created: 2021-09-08 12:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 365beb9d366b7d81232b8fce6834f448 SHA-1: 799eb511f709e93a87199e2b31d3044fde05a03a SHA-256: 1e2ff6b0ae45b9345828eefeb47fecd5fac12450df3bd32516150bc534b6b6dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the link farm pattern is a common lure for users to click through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=tendinitis+de+quervain+pdf+2017 PDF link annotation
    • http://ipllaser.in/uploads/98022613484.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/libol.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a459c1b9c62---tipadivin.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a47f38b1da6---bakafuzokutelezeguwokotat.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210620062419144.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/41340969690.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/7l1tua7uqt5vbpa4qcaijmdc9a/safamanit.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/118c9d09798aea2a67a5982d27c011ac/37992633113.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/46074510449.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/tetizezipusofimevop.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/tazifutud.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/1a20a094586bb1e60832b58a62354f4f/17716037744.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/pafozodipumekepapozub.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/14206397841.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/51954125668.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/49880622398.pdfIn PDF document text
    • http://93564497.com/userfiles/62598466728.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/693ceee53b07c278b92cda59f4e7cd19/zujirumumirisem.pdfIn PDF document text
    • http://allier-genealogie.org/File:/gizam.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a0618faa---28147653786.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/15183457100.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/tizafevinugoribabujariz.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/xezemiwotafebapefa.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160775cdcb0849---kuvukakajezurapone.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/nejivesimonajo.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_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 17508 bytes
SHA-256: 975533d088fde667bafe0ed623ddfd27d4b9ad28686a1175513a16e44ecec4c9
font_01_sfnt_off0001177b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F92 10944 bytes
SHA-256: f323721be5bb1bcb8af3f3e53b6acd76c75a5ba1444de7f9888ae54773b06ea9

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