Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ccf94364160809…

MALICIOUS

PDF

80.9 KB Created: 2021-09-15 18:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 23d899be680833427d98683f2b65c615 SHA-1: 12ab69974ded2ef73d02612c6fdd19717994d4b6 SHA-256: 02ccf94364160809b5d83f2f76c8932909ce77372d0d1d09e27c805db945ff4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress upload directories, and a visual download button lure. The primary URL, https://infrive.ru/uplcv?utm_term=adithya+varma+full+movie+free+download, suggests a lure related to movie downloads, likely to trick users into downloading malware. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=adithya+varma+full+movie+free+download PDF link annotation
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/35k21jnga43tc7vqmqttab25ns/neragolinijopejitenexoba.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/gutunuzuvotaf.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210915_E89DD054F0CD2F4F.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/88961468875.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/89602381592.pdfIn PDF document text
    • http://standardamulet.com/files/files/30276365096.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/fularadewukakuwepo.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16132ecca565fa---nefovigapuxe.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/lakeviwigizijetizovasulo.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/semowekobelonubekopel.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613844bf41243---53382050895.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/vubakekuvude.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/88147590732.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4ecd2b134c61ed83ec02f093074070f6/vipofidisevejiwofotudu.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/bowusexatowovamibo.pdfIn PDF document text
    • https://tcremich.lu/files/files/raxafomazubemajiwapibag.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/disepifovutufeg.pdfIn PDF document text
    • http://k1a.ru/images/files/file/forar.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/demepufil.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_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 10796 bytes
SHA-256: 4418a5471fc0b0afef2c1393ac0167282b071355acf92e00188f321420eb8660
font_01_sfnt_off0000f1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 17256 bytes
SHA-256: 2093709a133fc3eb896ccea71ca6551ed648d1e460fd225b659d8c1aa0264e52

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