Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc02f7e3da1ef6d9…

MALICIOUS

PDF

82.2 KB Created: 2021-08-25 19:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2a4ddd7c21d9c5b6cafa913e9652f6e8 SHA-1: ed084f49abe4ee4d7d4172057d94585c0c75577b SHA-256: cc02f7e3da1ef6d957e11652d2bef1b2c37927869625570436417786a6bc3d44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://remoteyourstaff.com/calisma2/files/uploads/watukidaludikenapeselob.pdf In PDF document text
    • https://delcinfo.ru/img/files/files/wumemubul.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16124250877d7a---17807718681.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610c9355e370b---webexixobak.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/76340601230.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/46046569504.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9bc29c2021f02e73c32e9af9a1f0b3b9/wegarogiwafaj.pdfIn PDF document text
    • https://digireg.ru/upload/baronowefefurovelaj.pdfIn PDF document text
    • https://manenshop.com/upload/files/torivotelakerexusara.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/wirubi.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/lilizu.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c0e0fc9e2d89d38d4bb0dec2c593b0ac/77033162272.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/zumizulolujifiwiluxivun.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/gezogixurutami.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/70011721268.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/pegugofin.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/3d73adaf3c3bd2a2941ccd10732682d4/gixopovimedobifofizi.pdfIn PDF document text
    • http://maidichike.com/upload/files/20997965827.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d35dc7a743c1d9c483ceedc33dfd0c40/fifoxune.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/ripejil.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd29dec2c6---xezawidolebazopezimub.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/52908fdc08ac141c412c350abdffd80a/runukezafi.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/51778909490.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16119b83779b39---27414170698.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/53706003235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=attornment+meaning+in+tamilPDF 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_off0000df9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9E 16888 bytes
SHA-256: 394a6c56f4bfba74d1ec07147872bd682754822b2503a2d8017a4174a0b09b73
font_01_sfnt_off00010ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C0 10264 bytes
SHA-256: ee41fc79d48b865b680c61e4b59d65c28d23499efaa08650869200073e8f5461

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