Malicious PDF — malware analysis report

Static analysis result for SHA-256 929ea6c2c2fd7a63…

MALICIOUS

PDF

85.8 KB Created: 2021-07-05 13:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ad279619e52d93b41fc51d0ca9a76e71 SHA-1: bc1b9908642b542468ada03758948faf9151c2fb SHA-256: 929ea6c2c2fd7a63f08802d326a9bc244dd7009ea22790c59ea5d728dcee53d5
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://billsky.ee/files/file/23265657244.pdf In PDF document text
    • http://daonshop.com/files/fckeditor/file/salulatagosomuzikezoxu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa3f92151---murepurunigojuka.pdfIn PDF document text
    • https://music-group-store.com/upload/files/xamixuxubu.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/giporidik.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c40cdbcc994---98111836875.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/14214418802.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/nuzirorasapikosuxubuv.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f07778a371---64904195794.pdfIn PDF document text
    • http://lucann.com/Upload/file/57356565008.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de026320b1d---laxematirixomik.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4ae8a8f0b0eb3c456f46ba8beb67b3ee/9266756120.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a758663e018---kaxijujeba.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/fuzodolobawu.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ab8566358b13bd0eb6137dfe2f962e6c/pixolipide.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/jsj4ucjhmu07hnosk6kgale7t2/rubawodixiwulaxo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4aded87b21ec99246a5cc96cfd3faf26/nijidaforakexamobe.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f66dbdb3---gijujazitax.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/32866974365.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8ee198a40d0ff6e8bd3e256414b28fa/borokawiwemivo.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/h3rmpjlk5l1klnihal7q8rrr67/19110598547.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jlnh69fhp1cb0664vak0536rl0/niromerusinote.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf573d4fb3---45855640506.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/nbverf29l6oot2771gb2blt78p/12151468706.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/dufimiwawirewinuvomod.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079134f7a07e---59350800823.pdfIn PDF document text
    • https://medtek.vn/storage/file/lelujabuxadekevokudubovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=chapter+7+quotes+to+kill+a+mockingbirdPDF 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_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 17256 bytes
SHA-256: 474fb42607957dc5832a1b22ba1d2c1af5cfa38322d357ed62d795c9f979d733
font_01_sfnt_off000116f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F09 11520 bytes
SHA-256: bc5265b3026450e7788ff31e2272b7967ec905474e46047f49138cd25ae03ba7

Open this report in the interactive analyzer, or submit your own file for analysis.