Malicious PDF — malware analysis report

Static analysis result for SHA-256 14124695ad587e82…

MALICIOUS

PDF

78.7 KB Created: 2021-09-16 05:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7917a716c94e4ec998c1b08ab280e8e8 SHA-1: 121cdb13e0a7baff4cc5b914b8a460cb1967a6be SHA-256: 14124695ad587e82d7a51d65629f2efd04bc07a4769cad004aa446f1babdeca4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=justice+league+download+mp4 PDF link annotation
    • http://yuli-china.ru/d/files/16311450032.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8d2aeb28dc3b32394a5763c83ec4d895/sexoxerimuz.pdfIn PDF document text
    • http://hexindechem.com/upload/files/55114339584.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/pupatifiv.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/39255013192.pdfIn PDF document text
    • https://mackbeks.com/files/file/5111116489.pdfIn PDF document text
    • https://securitydm.net/slicice/file/wiveguwud.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210911_115CD5A2E0BDA8D9.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/33984697108.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/40060786739.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/linisavuketuje.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/19414897853.pdfIn PDF document text
    • http://imaginove.eu/data/Files/21199755505.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/41309219316.pdfIn PDF document text
    • https://ysh.my/userfiles/file/vemapalipawebo.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12958809821.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/64892525274.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/99357798057.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/dukefozeg.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/nisuwenavil.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/a1986098ddd801266dea988f7f81531f/lazoxojaremenu.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuposefiwatugudaxiw.pdfIn PDF document text
    • http://sql110.com/pic/61800261323.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391c26e6ca2---jekuz.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/kituxudusunibaduxovivu.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/43663780654.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

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_off0000c925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC925 19288 bytes
SHA-256: e14bb2d2350d0cbb3e85f2d38005e604cb119e32d485e04e930e74ec3a7757e8
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 11012 bytes
SHA-256: 85127471a160afe2e55008bb1ee8d7e70c2b11b809a85f1ab676ae300944ab63

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