Malicious PDF — malware analysis report

Static analysis result for SHA-256 702f89b074ee10a9…

MALICIOUS

PDF

88.5 KB Created: 2021-06-29 14:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7d0b05ddcaf82945afd241a982fc7bc2 SHA-1: 1719750972f2698f373d0407a9bf9c0e65674644 SHA-256: 702f89b074ee10a960df2244ce95d437a3e5cbc822bbc3ad37fed11c1a100e86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/uplcv?utm_term=d+block+elements+show+variable+oxidation+state PDF link annotation
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6e5b542c6---91297081176.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/71893463116.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/gugemexozirupezepirufek.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfe69599eb---748154675.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ot56iuead6sqi51f3i5g9hi8p2/26739099036.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/17314760440.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/zeserof.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/72164175162.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/r9hac5hkhprmkpapt9of7lgpko/71943087414.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06aeb33d5---jipejirojom.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e94c00374---35671455464.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/475df547c11a83e6cc96d933444f5dd6/xazafinukoxodepivurugeze.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/pudokunoke.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/0918ff2f69338939c392e20622da66e6/ximeviruninefaz.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b293801e433---95312439705.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f7ee0d121e9425e18203233c114c56a2/97818675262.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/36grgnp72u5tpfra67thbrvti7/97133561398.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/29697363561.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dd670aede---lirotopatawemitamavi.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/35644553709.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_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11120 bytes
SHA-256: be7889c6e6e53708ea5e05e1d9841da269931a73461d0fb7662ac76ec8d3c5e6
font_02_sfnt_off0001274c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274C 17284 bytes
SHA-256: 675786a16fa3047f75d2cfd5374f6137cfc2fda9b584e432de0fb0e8015386d7

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