Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc1518d50b7ee53…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 12:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 713fbb71e6544093a9d075c80f016645 SHA-1: a05463814fa442f457b93ce9bca18bb79f509343 SHA-256: 1cc1518d50b7ee5375891a259cc4306b1f84c360e8eaa27382fa447e1888c34a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious files. ClamAV and ML classifiers strongly indicate malicious content, specifically a phishing trojan. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b54c377c540---zefibojofaxokavabona.pdf In PDF document text
    • http://nutrisoilvietnam.com/upload/files/77846060108.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/gezojiditimojidipoxe.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/56204730735.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2f66352a---rokuwanofopixomube.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160859d4796b4c---18194060703.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kurozibodupedixu.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2a8be11a---losapalasukefikosi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/4ebdfdbde1910e775da8879a101f75a5/60634226080.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/76qhkj0okachkj9es9qmp5uj0q/bazexunorolabutunagu.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hutdbl3bpab8vbu6f5t1kjq75j/99415665002.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/2054t1e7q09o2bfk1gda57e5av/sawowixarorutegapobawefer.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/11703422436.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/8b7ce10606403600cb657fc2f98d0934/52213670946.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608656edeff48---92243198136.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106181845427924.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/47712350733.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/nejig.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508164537.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079ca1d6e31a---58627598534.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b656d7ee292---53014754154.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/f0jpp33eariv54vqco5rc0p7a3/xexeforilariraduduxokes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=types+of+thermal+pollutionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 10800 bytes
SHA-256: 2397b9a4f70c90fb5a4bca117680b1df314b3a5ca8a30e9f981ea6cd780a1886
font_01_sfnt_off00010642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10642 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 17328 bytes
SHA-256: 49e4054548c8380c2e6ab8dfcc807d7cf3b54fe45daa78f258b95e23c935aeb8

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