Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb61dc67584effe1…

MALICIOUS

PDF

84.4 KB Created: 2021-09-13 12:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 31ab7977d62c33eb792778e916bae1cd SHA-1: d9cdf571222ae55a1aa6276467b751c978c96448 SHA-256: eb61dc67584effe144c325ac13218db51fa25bdf079e6156558d4e2a69914ea6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attack pattern involving directing users to potentially compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://laborke.ru/uplcv?utm_term=pgt+pro+apk+download PDF link annotation
    • http://architectureanddesign.it/userfiles/files/85011186098.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec2879233e---kemoxuda.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/55838838012.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/9886172035.pdfIn PDF document text
    • http://bulmarconsult.com/files/daxuzozogegozafanagalipu.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/vunudosanixedate.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/wanewobolisowesokugu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/64164569527.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/jemalesogixazobusuz.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132030c43f0a---kojinapu.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fb803b6bb---5609985674.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/73961061241.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/pukigowoz.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/86518388357.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/92604854995.pdfIn PDF document text
    • http://th-hl.com///upload/files/43317436390.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/327177a0c8881ba214b82cd81704b26e/xokilaxokedekogif.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/86436235662.pdfIn PDF document text
    • http://wixoon.hu/upload/file/3570870855.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/sizemagazolenumakarutulu.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/laxuxaragov.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f00e4db4a---puzawazevu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45B 10356 bytes
SHA-256: 746b04a22e8caaca3c9ce89a990951a09724bd0b64ea317f2dba970d26ab52b2
font_01_sfnt_off0000dbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 16152 bytes
SHA-256: 0f62411f33c11177563efe33ebd0105f37df2a55e6a92cd5aec3f2cc21bf3838
font_02_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001095a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095A 22196 bytes
SHA-256: e9d0f97c6b6fa1198d0e469e8596e70f06e5d031cbafdd6e8de33faad97cae37

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