Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edccdc2f84c74ae…

MALICIOUS

PDF

106.9 KB Created: 2021-07-19 06:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7cdc2a781efc7b5d000418087356636 SHA-1: 32112c8c41cdc7610ebe4658be3145dfcb8c15f4 SHA-256: 8edccdc2f84c74ae10007d7c285f1e0ba5722424e85ca36f6deea5e6940dd21a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of links, many of which point to compromised WordPress sites. This suggests the file is designed to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.alapan.org/fckimages/file/folixugipomagu.pdf In PDF document text
    • http://hangquangauto.com/files/kuzojenogulov.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/7fff53724f2ae9fb7998311545ad6b67/vesad.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/fd76e76d66c5ug6c6dlap06cq9/daderekanorazaxidobebevun.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/wibojus.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/529f48da6410ada1e7ee18e45cbd0fe2/37181492130.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d65c7330d---60211685028.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160832574f0104---fekazopafojopivopulore.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/39958215331.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/316544d51f95fabee2e1ad7bdad75aa9/14721220230.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/bagipesilun.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/48706200394.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/12830793391.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/8438757245.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f0b86837bc9b30b554658d93d07fb4f/semadigadobev.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/302f81288cdf6243023a25464c106615/wazabegidiw.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/57d259746e5cb84949b8b363f0ad357a/69937311693.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/wawugelajomubugozax.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/16109062095.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e2a2e9049b577e3502b6ee3a2c93d6d7/33444619576.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/dipakatagajabivodoxelow.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8ab0b206---31262300290.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608187f429c87---68335534788.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e6c02a420---40729757485.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/uss0dh96u0e0vmfoi3aaj7pf9m/33083701546.pdfIn PDF document text
    • http://ipublicity.cz/data/file/wimexupodalabemoxefabiju.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5082f06cf8---dazilazed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=purpose+of+phototherapyPDF link annotation
    • 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_off0001405b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405B 17748 bytes
SHA-256: 6a75e3122944e4968ff53f7d9cfa7a57130db2da41a39608a6e4276abf17ca92
font_01_sfnt_off00016e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1868D 10428 bytes
SHA-256: 01f3675b8a7581d60bac9cdfac0c043859ffb18af09a64c18708527b82a829d9

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