Malicious PDF — malware analysis report

Static analysis result for SHA-256 0450814fc8f98fb7…

MALICIOUS

PDF

86.2 KB Created: 2021-06-14 08:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6786126383daa54b11304141a0ab3e04 SHA-1: c0290b01a84e344fa2a94d26ca15efe90126f9bc SHA-256: 0450814fc8f98fb7e0dd21dd1f5665a0b3d58ece8be031ecbf5b95ba493ec29f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, suggesting a phishing or SEO poisoning campaign. The document body, though heavily obfuscated, contains metadata related to PDF creation, and the presence of embedded URLs indicates an attempt to redirect the user to external malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/uplcv?utm_term=how+to+compile+photos+into+one+pdf PDF link annotation
    • https://basisnomor.com/contents//files/nijenidebesoburivepubigu.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/44g4nsjq5o75g79mf1pcgdagh3/modotasigapikidesitatolub.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/latagosatumokejenugezud.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/vdr2v4r2tdjvgt16ibm87n9r30/54202629710.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4ee208f5---39313244422.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/60953953782.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2be99a6d---64341693332.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7bf8fc4ec2ffef5b4940e341b3ba2c6e/70965644842.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/ff14edbd5d6b5c97c631bc7b247bde89/nelusesufelaxemenaguxima.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/1372432364.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0277c24a---rajiwekafosutipevekifuzup.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e8ec5d7ba---4501743519.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/menapawafefuxukizoluri.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/040a27ad993a0dfa34118b89e45cf828/fosavisaduzabazaw.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/gjkfu55q4dta5gj4udc00qubk0/24983840215.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8326bbaa17---15142104795.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/632447dae407fd2aea9716944ea3849a/23978000635.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/posusot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 5140 bytes
SHA-256: b7563400ec60c73f12d736ca05fed9f592a16fde3914d55301b4dc84ceab7122
font_01_sfnt_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 3092 bytes
SHA-256: 41e6e99b10617d737f01889771d7b1b3ced7ffc02275dce335d68a6a706ac4f0
font_02_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 11532 bytes
SHA-256: 8d0a11c36df0721f4a40fd278fbc1ffac2926797dd632381b0abba89d763e475
font_03_sfnt_off00013593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13593 16336 bytes
SHA-256: 92ca5277a07040a1118e6ffe557fff1b4332eaf15e577e4df2dfa25513d903e2

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