Malicious PDF — malware analysis report

Static analysis result for SHA-256 36696ced8baba100…

MALICIOUS

PDF

83.6 KB Created: 2021-09-17 20:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06a805740fce57781e7286812fea62f6 SHA-1: 5e2c289f91cfe23a332dce60e282d270bbe09229 SHA-256: 36696ced8baba10093a43638b4605ebc24e5f4d1b334d450ac6c2a5d066faeec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • 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.
  • 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=gmail+password+hacker
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141efb2f0fa2---98538661002.pdf
    • https://mgc.to/sites/web/upload/files/43270750512.pdf
    • http://tauroconsulting.pl/userfiles/file/tezorulip.pdf
    • http://mikllc.mn/uploads/files/26146074399.pdf
    • http://konstruktor33.ru/app/webroot/files/files/40576724903.pdf
    • http://scales-center.com/shop/fck_file/file/woxowejiguwemubamed.pdf
    • https://998.geektic.com/geektic/files/33979129827.pdf
    • http://geerhannutpourreussir.be/docs/upload/files/69387469223.pdf
    • https://jmtours.co/aym_image/files/gurosavovaxebuxazikebi.pdf
    • http://techbis.pl/files/file/xiwajutojonopiruwijotiwum.pdf
    • http://jump360.co/upload/files/20210912081937.pdf
    • http://otohyundaidanang.com/uploads/image/files/bixeviwoj.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/466b3203dbc6bae8edfd8128fb1fa3fe/65079199835.pdf
    • https://euro-m.si/web/dokumenti/file/80870089951.pdf
    • http://duepassidalcentro.it/userfiles/files/35449927235.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6fguln40ao00i6fleo7crhpsmc/45056374573.pdf
    • http://tischtennis-kiel.de/images/file/xekudumalejivaro.pdf
    • http://tsrmvolontari.it/userfiles/files/99297763063.pdf
    • http://zovsh.com/Uploadfiles/files/xarup.pdf
    • http://royalgroup.at/tmp/dodusaferopamam.pdf
    • https://beauty-full.ru/uploads/files/bopolew.pdf
    • https://wangwangcamp.com/uploads/files/202109060623108459.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/m8tuk2a6mqvqda7p1me1c7e8bc/tovobinemofotozekeb.pdf
    • https://pontus-sd.eu/uploads/file/89771073070.pdf
    • http://cw-cut.com/uploads/file/toxubesuwovapazuxo.pdf
    • http://1544-7419.net/upload/fckeditor/file/jipixanapudopuze.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9f.bin
61ba4c4afc86bec7b344718c3b76376c43606db477c4bfbd4647484ff07c656a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 10792 bytes
font_01_sfnt_off0000f689.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 16792 bytes
font_02_sfnt_off00010e9b.bin
cd224e4adafdd93aff6749d6aceb18b81c3c740d5514abe3d74f5d5f807b7a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 19368 bytes