Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce538af3bdb507b…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 02:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e07c8e9880bc47b428a798bd7fd00146 SHA-1: b9734855fb214ca1f4a9c7e7df197090e74fe9c0 SHA-256: 5ce538af3bdb507b69b01ca1783595a54a228397604a116b9f80192848776d25
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites, including WordPress upload directories, suggesting a phishing or malware distribution campaign. The presence of multiple external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=sources+of+strength+spirituality PDF link annotation
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/289cd80115c74107b6811277da8e6c55/zeziduzupinesirarodu.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/hmo29sqiag547qg567bre3qvpb/34776314986.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a04d109a1c54b891b4d60e4edcb2f066/wofuw.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2v2jkaftemg3mdo0qd4hg2csl6/32269938327.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/373e71ed4100a77ee6557eb0bca92fe4/merasakutiw.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/76211473513.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbfaf571aa---10529426798.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/vapofiludedijor.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbbbe5099e---wofifopajunego.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/okbdbo2uofecamjt5kfhnsf5g5/nepigutuxod.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160769871f3b69---sasopijokezoxanani.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cc04ed0d3ba095357b51abf887a39f8b/73013394153.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/45b15006cc0dda53d2ecae56bc8d1160/90371731232.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/78086023497.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075498d0fae1---53739737274.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/roresiwajezezaki.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b9d892388---pivofukivufowatijagakibu.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/beduzixabugejigan.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ab8ae97a63411be994d1ef609164aacc/28527135474.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/27752748477.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/negijajume.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/sibapowatebatedanuforiral.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b125181d0bf---rivexoti.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_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 11048 bytes
SHA-256: 457742c6b9336aba9dc96d6dca9225329a8ca9caf05c026b4fda3af8eaeb79c0
font_01_sfnt_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 17244 bytes
SHA-256: e7fff27bbfd7490ecb36fede6f4689e334feda13bd5e9ec700ced876ac327a89

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