Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae7ea3877ec76ab…

MALICIOUS

PDF

62.3 KB Created: 2021-09-05 04:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be047f30054429a9a4fa7eca82078286 SHA-1: 9fc219a169b07e115b89a02f10f037afb1e5a041 SHA-256: cae7ea3877ec76abc3702f7606aa7ee8af482115ba25e548b172e83dbd466a10
154 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, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous external links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

Heuristics 5

  • 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
  • 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://takarasushimn.com/userfiles/files/6542974235.pdf In PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/83013191920.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/negijamujefitorutit.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/30906079345.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc40d285189---83277121017.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/tevarizij.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd2b2d8a8---fuvozixevimozazijozule.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e9b21075e---nodanodadiduremuza.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/a50cb66a1c7e581bcf7a7b2bf1a88619/49742423103.pdfIn PDF document text
    • http://zuche0551.com/upload/file/48900482522.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210819131327.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/wolawelabezopidoruxaku.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/d8e2b079c8306299f1799e56d368c511/40413011345.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/xufilu.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/4897666933.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zukapitosazolovurij.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/15568087386.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/zufejejejedet.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098b26176f2b---42368013142.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8419577ab0---84584897744.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084a832c13c2---86870733084.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3e31722213c64987330ac68e4597c0ee/zoriwanagite.pdfIn PDF document text
    • https://seger.cz/userfiles/file/jolawaba.pdfIn PDF document text
    • http://apvn.info/userfiles/file/bebosuvefetimirof.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c78c9d625---63535075256.pdfIn PDF document text
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/kanawemudatatefebodiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=substance+abuse+worksheets+for+youth+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 11188 bytes
SHA-256: e8f496838abcf1763faeadaef5358ec1943c8d191ad7658d40d1155f67def516

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