Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4fa0cd64eb7ce1…

MALICIOUS

PDF

89.6 KB Created: 2021-06-28 20:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2d0a34765daebabc7bb801909ff6b957 SHA-1: 36fbb07fdd22cb786b4866ae59e86eea682fa3b6 SHA-256: cd4fa0cd64eb7ce11bcd5c3ad045e7d025ac8376e596016468c46e90d2fae3e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further stages of infection or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://bevelec.com/bevelec/dossierMois/file/54095247778.pdf In PDF document text
    • https://scavilecis.it/userfiles/file/59472898166.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf1c18c3f---janugezavuxodito.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/19030745051.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3f09aa4c2771919b2cecb4d02146c1e2/90340467087.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/4u8dncstc9ji01djqsl81nog22/xemamewejofobipojaviroli.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/75186665197.pdfIn PDF document text
    • http://amdind.com/userfiles/file/venozogavix.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d7788396c---46745944748.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/6dadfa10e486ad5caf178ea9c7d2f10f/pakujazivuvu.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/1u33egvi2v56ja7uqhj46755ts/pikesebekorofagut.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841b40513db---97886744330.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/jojarafujami.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/lajaguzedaloxa.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/29142134155.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82f78aeac4f7fa2f30f06b1fe15d3ff6/96776591998.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/649e33f22c8c21b0e1e0a8359a9b09d6/tuvasezumogogevediraka.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b956e54a246---jolikinuvofekiwaba.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e669035f8c---24757568575.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/wosuzawifozuna.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/5911418934.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/84954847219.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be366ebeb65---ramilenabekowa.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c227c70466c---10819165594.pdfIn PDF document text
    • http://hevolta.com/upload/file/tikabexisedudurisutajo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/87502977820.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076260e8db86---4459027980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+next+total+solar+eclipsePDF 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_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 18444 bytes
SHA-256: dc774883dbf8263f995e88e92b606ca7da0e2ae8bab1015af73c122f2a775bd6
font_02_sfnt_off000140f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F3 10536 bytes
SHA-256: 2888a4a703158675dbfbd8416726e933c932bd1125d4dd127875be9d4109fc6c