Malicious PDF — malware analysis report

Static analysis result for SHA-256 8484715beac3d32e…

MALICIOUS

PDF

132.0 KB Created: 2021-06-29 12:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c60483b5181874ec743a92d9a8353ac5 SHA-1: ac96b27db4b31d70ab418ae969f8547a0c491d17 SHA-256: 8484715beac3d32e210d4dae99a9e49edc8c77c0d46f1a66fe9efc588777c4f7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains embedded JavaScript and numerous links to compromised websites, indicating it's designed to exploit users. The 'Remote Support Lure' heuristic strongly suggests the document's intent is to trick the user into installing remote access software. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9721

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://impeka.lt/components/com_mijoshop/opencart/image/data/files/dikubasabu.pdf In PDF document text
    • http://champagne-marc-chauvet.com/images/files/78827302568.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5e9a05d2d---51602810193.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/lubip.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829ad1b0de8---pikezela.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83404fc09---74585991127.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad4aad55c---87928185528.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/83904290694.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/42664261229.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/99285826645.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/cau36eiti84p1krb6ktkj4d7gm/bovovabipujitaxe.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/ebfc2281dfacfe76d4ff8edca040c96b/2182239831.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/ffbbb7286bc9aa75332f3e3af767b509/76606688458.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//14524417776.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/zoridutujevasele.pdfIn PDF document text
    • http://imi.vc/upload/files/68972167372.pdfIn PDF document text
    • http://unsersohn.ch/images/file/ketaxotudisoxivat.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/8adff446dd1f9eb64a55b84546b2257c/9530152911.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9854749998---sedipodotuwolajejetifokab.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830b685255b---53524281140.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/sunewufiwogekufogomig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=no+bother+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00011839.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11839 26092 bytes
SHA-256: 8e551fb03267a3d79c4185eeab6430490e123ccf898199e7ba0a8d087a9ded8e
font_01_sfnt_off000148cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CC 10460 bytes
SHA-256: 8e63d2440452c6076db402b4fd0ea49456a25399b7b35cf181dd1a86f91c53ad
font_02_sfnt_off0001604f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604F 21116 bytes
SHA-256: 0dd0ca0f8a79e3aeb9688626ba35f03cb019277952ea008f9ee827e32ba11cf2
font_03_sfnt_off00019e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E85 32896 bytes
SHA-256: a3e833d3babd58b2f91337fd5460971c580b929f752aae6370f0ec6f58bf5882
font_04_sfnt_off0001e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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