Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2c5d9ef1522bf4…

MALICIOUS

PDF

81.4 KB Created: 2021-09-02 10:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 69baff08da5936b19aa48cb8cd067df8 SHA-1: eea7ab0f239188585afe3880cbb5e2cb9de54670 SHA-256: 9c2c5d9ef1522bf4c732f28d119f1ad6f5a839a3a78a44314c85f64e94ee9eb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection 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 0.9974

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://queure.ru/uplcv?utm_term=fatteshikast+song+download PDF link annotation
    • http://bulk-supplies.com/userfiles/file/noxomade.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be8311ad87---zajige.pdfIn PDF document text
    • http://lex.tj/img/file/58302817771.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/51083946641.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/73544735580.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/7ajncddk2e4ptnar9tmqvhdhj2/30219436167.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/742c04282fdbd399989889eb8f6c1aae/20859025876.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8543ea778---55136277298.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/1jvuvl7fh47lbiova12mkrsfsh/66379188615.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/80662062851.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/66548589733.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/panunatatamapone.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79d00f40a1---takamiwemebadapa.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/v7lfht8dmmbn8poidlk0o4u1b2/98900589979.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/fuxelitakaxuvag.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/70008v0civfuh2otieu2scq6vt/32696921485.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/38151225881.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607598fe1aca7---wipofudik.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6a1ae8da43a4a5cc343a425e05920af1/notowe.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4efcb21b06---82292062212.pdfIn PDF document text
    • http://altinay-law.com/images/file/9475229987.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/05d0f53f92ec57db9fabc7319dd67503/27979824660.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/7e96a2ea1be5c67a067475c1af6e337f/mukubevat.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///relilipebejova.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 17168 bytes
SHA-256: f2181f7df94a4728a15909114e0477fc97f298416e79e87d8a4aef3bc0801fb3
font_01_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 10584 bytes
SHA-256: d329f6578eab8596c2a29eb02a149fd80c8d158da2a7dfe1dde6fc9e42b41a18
font_02_sfnt_off00011ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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