Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e691c70e48d00a…

MALICIOUS

PDF

78.5 KB Created: 2021-06-26 04:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83ce94dffc0f4b7983cfd033daa4c45f SHA-1: bb8946ee67cd2b73d754407cdf119aa77bd9f928 SHA-256: 60e691c70e48d00a83b723d3085602ea1109495e621b2e731d1e5c7c12586a6e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked resources. The document's structure as a link farm suggests an attempt to obscure the ultimate destination and leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/cad522e9b7622ceb32843b556160a80c/88752950153.pdf
    • http://arci-mp.fr/admin/File/lunegukenudedelenuk.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ba291a894e7e8a0f6a3b1363bcbac0fa/57807968168.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/xefurubozefogapurogow.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e2818237d---rubumobebutuz.pdf
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/waladudomelubujidazas.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92abc6e28e---40075533238.pdf
    • http://classicalgardenstatues.com/uplds/file/77769655481.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/70404601197.pdf
    • http://ldbell1965.net/clients/85689/File/95687516460.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f2367712---nokivakibazimiwif.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb3b9021cb---bejofanogimof.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a8d2833d---xolesir.pdf
    • http://parkhighclassof60.com/clients/871169/File/denufibalawerezexivagivu.pdf
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/60547208646.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160806b9f5f58a---24066735411.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ec5631i8v40tcenhnjgg9nu5ss/sokanoxi.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad165436554---43906612305.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e520415017---xivuxizojuzim.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/d989fd172bb04668d7d7d11ba3f12d7d/sikolit.pdf
    • http://pospatrans.cz/UserFiles/File/50566162292.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f6b64a024571572c82a0c8af81550177/39260373526.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c053a528d---duzovusasujizexudopexakek.pdf
    • http://chroscina.com/userfiles/file/60719965630.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=lesson+1+homework+practice+scatter+plots+answer+key
    • 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_off0000d205.bin
6d1b1cb8ff26e60dd2a764bce43cc053b4e039b297efd1428487e4c670c81fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 15964 bytes
font_01_sfnt_off0000facd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 16792 bytes
font_02_sfnt_off000112e4.bin
2a73b94fbf6b2be50ef10d4c25645feeb76023a9a65e72ad1b163c138a1ec8b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 10940 bytes