Malicious PDF — malware analysis report

Static analysis result for SHA-256 785506fece6ef197…

MALICIOUS

PDF

89.5 KB Created: 2021-07-18 17:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 971abed11d4188fae4fc790ef396209f SHA-1: a320f6ec835f3e500615bfb71fff242da2bcfcd4 SHA-256: 785506fece6ef1977803fa094a2e80ef50da20b45c04530ae04df620cc706b44
164 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate the PDF acts as a link farm, pointing to multiple external URLs, some hosted on compromised CMS uploads. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/7e0c5084e6e227d3f94cd55e880a97c1/31375496901.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/7ca5cd9b5768ce6e7860e21976179c46/vupowewanuzabowosife.pdf
    • http://matstravel.ru/userfiles/file/15414765630.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ca0fa44---fovemanewozuno.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/825723086a1a92d58edcb86f271f3b9c/21216357431.pdf
    • https://najlepsze-w-polsce.pl/uploads/10336011609.pdf
    • http://eurekaelearning.com/upload/news/file/regalawile.pdf
    • http://adamlegal.com/userfiles/file/57878067698.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a0c02f845---91965025587.pdf
    • http://abwninemile.com/uploads/files/zepimeg.pdf
    • https://meganimal.pt/site/upload/file/wepotakurewageva.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/towonajonemix.pdf
    • http://refta-bg.com/userfiles/file/58610928287.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ba856619b560835efd6d74ea03e16a95/rilusipupumiguzosevinof.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/0495c1ca3e475e5fa51280fb118e5f59/63330235073.pdf
    • https://fajanav.com/aym_image/files/fimexite.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/64f5f8bdbbf2d05e0e823dfcf891c3d3/8244771995.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/modapu.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de794edae---1313278433.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864802c2ef0---mogexebap.pdf
    • http://mintaialuminum.com/d/files/venegesaf.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ab8a7c1ea---gopakoxaw.pdf
    • http://maility.pl/_ADRESuserfiles/file/xogasiremafu.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/e6f67fb092181aebcf87b0409278c510/40350812030.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff0cfed97a---tevotapinibigu.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a51935d3be27d7d4af5fb50837c0106/tonuxirujugomewulufip.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=neet+previous+year+question+papers+with+solutions+pdf+free+download
    • 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_off0000f778.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 16792 bytes
font_01_sfnt_off00010f8a.bin
e8935ab4cc80df58d4cc62aab75a66497ee1303d34b8aa86a7185456ab68ec9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 17036 bytes
font_02_sfnt_off00013c1b.bin
aebc51de78ab9f311a71630f375c9aa719a61896d1c6e882656a10e1882dbd34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1B 11084 bytes