Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d60a926ba1f90b8…

MALICIOUS

PDF

98.8 KB Created: 2021-06-26 14:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d43494b67c2c4664d622c9fe2ebc7d93 SHA-1: e4e78cea2ac0d3daf7d73567e9c63985c3aae010 SHA-256: 9d60a926ba1f90b8a2c7ea68a0ec400e262473d7f83b05f244a16beb42bfe91f
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links and disposable hosting points to a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://pistant.ru/uplcv?utm_term=inkhorn+controversy+examples PDF link annotation
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f384353fd---vepakibavufodetudu.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/vubipipawu.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/28785711990.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb0c21aa9f---rejida.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f7aaa252---lademuponeposazugu.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/tafemise.pdfIn PDF document text
    • https://raljob.com/userfiles/file/dexenop.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/37164068525.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf4a4bd2d8---vexapugidugadiduwupawidi.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210526_182606.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/lirezepivavivosikof.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b7b8f1508750f40c08adb3ad296b155a/weninot.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b685ebcec48---1900786645.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/18106320834.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d39ad29046e---21458835665.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5711eb94---kejizesizebisaro.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad71cc4293---sekitexolipogevojidigu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f73896c3---venulinavudunupof.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/39309980444.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/97158474760b3baea5319e.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb3ed984b7---96702067605.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae0c7f044---89495447713.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160877d2261ccb---72087041235.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160758b694fcee---72321690747.pdfIn PDF document text
    • https://tonitomov.com/picture/file/rozupalozej.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/46712815437.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/25778917598.pdfIn PDF document text
    • 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_off00012174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13986 17108 bytes
SHA-256: f296f1d6ddc04b0ad9898a56e2cd1af8d544691df892213a570ed1fc60877fa6
font_02_sfnt_off000165a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A2 10872 bytes
SHA-256: 15774661edb11649f3128920404140941e3be490b30a2c1221b29b9019f19f82

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