Malicious PDF — malware analysis report

Static analysis result for SHA-256 202e9c39a5be41ea…

MALICIOUS

PDF

92.7 KB Created: 2021-08-09 21:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2943d9f6b936dd75120d55ffb7a010d7 SHA-1: 3d615ac8ceedc6a68f6ffdfb5a2a20a689b62c3b SHA-256: 202e9c39a5be41eaff7a2f00680f7ab417de1cff9ac29cfb88b3feaf2f26f7de
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be intended to trick users into downloading an archive, possibly containing malware, by providing decryption instructions. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/uplcv?utm_term=tekken+tag+tournament+2+ppsspp+download+iso+android+emulator PDF link annotation
    • http://allasclub.com/campannas/file/wejoti.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/23347892300.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/zifilar.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/bunenebiniwitop.pdfIn PDF document text
    • http://runo34.ru/attachments/file/gaxejumonizupifuwi.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/q24q9iff1hmbubapljsciqi0h2/sexijasafikarezaf.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/lm5b5tksq5a06fvnblr83u029s/44319906199.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/77744326773.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35ea90975---nakadiloberorima.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/74efc4c0c733d55c3349bf4e052582fd/24418955614.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/55482724132.pdfIn PDF document text
    • http://learningkey.org/userfiles/bizomodekasugosoxa.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77a2badb07---88231837618.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/5990a344dbdca5c19e2f2e6e3cbe1ed1/74160161890.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/d17129f3d7c54ed5858fa9dc2c4fe150/48493893820.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ucvucoddbarnnpi1idnuf69297/94316908826.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd9d9b0066---julofoju.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/kasixetam.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/93157242307.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/mezepabimono.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/5128250612.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/26887234159.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/17812178827.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adc10c4bb6e---46171608434.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_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 11096 bytes
SHA-256: f46b04b6eba7d45f0ea0e25ea7bf04fd213bab2220ee3d71e9c725893c1e07f6
font_01_sfnt_off00011c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 17828 bytes
SHA-256: c58236701388165b712ec885800477b0b65923fd2502a80f9d08feeb2da70078
font_02_sfnt_off00014b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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