Malicious PDF — malware analysis report

Static analysis result for SHA-256 5014ff258cd97ff1…

MALICIOUS

PDF

84.3 KB Created: 2021-07-22 19:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8547df8e49d877a20ec957451d5e0a9d SHA-1: fb2eee33244fdb8c067ad698a2ccdbc08a5eb540 SHA-256: 5014ff258cd97ff1138790ee7cb97ce0c289d8de498b9a4a241c421ed94e0928
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and flagged by an ML classifier. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of multiple external links strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://bydnjl.com/userfiles/files/55274754919.pdf In PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c41c8403df---pudikipasisele.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/vokupinidupazifewos.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d370e2c13b---6293618290.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/15502184220.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/parorusakabikuf.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dfed44bdf---64107004655.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094261a4196a---fugopejikizidezo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070736d3d8b6---fafoguwunitabegalexasani.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/sufaxuvakitoxijoleluko.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d062c7e20---76750438448.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/xomikidesutufuwajalilokaf.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/c492e6f82d37f330fd11a727d0372d0a/54083706518.pdfIn PDF document text
    • https://actorconseil.com/files/file/fufelimozemoxifixonebi.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/zejemogodipunujokilufon.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c34e8554c79---bikumadenuzukebirefipu.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/koduxabapaditidatodibevu.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/66466288337.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/kotawugifezifatijagew.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f740ec0c682fc1bcd51f88535b7ee132/21353153095.pdfIn PDF document text
    • https://bak.vn/upload/files/79859022103.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uettls31ep8u6k14bbi7gj1c96/safefeseb.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/44a30ad92fa7b9b58015a56bb285ab6f/27187676587.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/66978471921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=will+be+going+to+present+simplePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 10564 bytes
SHA-256: 079600e2c517d2f52e9dd07440d958cd22cb81c9d76d69999cf801b74f7486b1
font_02_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 17248 bytes
SHA-256: 0feae3f93cbd39c357771279607fc853936f6c9f6f475d843b885e7b36034a5d