Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabe852058f3ae60…

MALICIOUS

PDF

168.1 KB Created: 2021-07-29 23:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 27bbf70b9479ca0ef23423750b4ea268 SHA-1: 8ce0fa0fd3c6d9352ddd5755853d56bb0955a281 SHA-256: eabe852058f3ae60af4db30276204700fc4d278bf7b4510ee5d96b294e3fc8d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8557

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://coretry.ru/uplcv?utm_term=sword+art+online+alicization+episode+25+netflix PDF link annotation
    • https://retake.dk/ckfinder/userfiles/files/zesolafevikubu.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/xipurinijeretul.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/zofozolobefovarirevi.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb44c2b71da---xukorifekapakap.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8ed0d98bd---88248416747.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/24499376730.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e1242a4db---97896809292.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a965be039dfc7d697ed6060c94bdf5d1/65855400419.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c65450363---31624191382.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/q0o4l35hj9i86hlg782ot8cpq5/lavejamonezokoma.pdfIn PDF document text
    • http://vuason.vn/upload/files/13590334522.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/ranogunekiruwuxofifiti.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a3cf778d31673cb17f1a9e9bf20e8900/29398576901.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/44452140509.pdfIn PDF document text
    • http://fabienneblavier.be/upload/files/77040312295.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c1e163d89299f4fa68e3fb32d27cad9d/83857997034.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/41419075339.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/wifizevapekiwefadug.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ac8194ba1---42090902766.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/wudosepavulenifur.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd46d292d---1907386971.pdfIn PDF document text
    • http://popmetre.com/news/files/jifetigosenenotufozefavi.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/4ffd8e33963c875500902782eeceeabf/pazifowafimitamefusevonax.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/kuzajimulubaxutik.pdfIn PDF document text
    • https://www.espaciocultivarte.com/ckfinder/userfiles/files/44787053670.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/df6e3fbf5530a4d48712d1d1fd53e5a7/niboguwasadutuluwumoga.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A563 41900 bytes
SHA-256: 10c360811236614323e05f5d734f1e1398e15025b4fd79fb0955c1a3f090f750
font_01_sfnt_off00021a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A52 11188 bytes
SHA-256: fd82b1ecbf197732637ca1259d9b023675919e5df61bfff462a65f2558f3a341
font_02_sfnt_off000234c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00024cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CD9 16192 bytes
SHA-256: e2ad764752cd4be5999c18614362e0cea8e9c563e7196d76fd0086f860ccaf5d
font_04_sfnt_off00026262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26262 18060 bytes
SHA-256: 5bb203a81d96a8ad9dc4c1d0e87333332d8ce804abd096ff6d28dd6d937b2489

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