Malicious PDF — malware analysis report

Static analysis result for SHA-256 0282d620f1e12a45…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 21:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 56097ddddc0ecaee1ae0fce45e66db60 SHA-1: 182ce935fc733f9d081b8acfef706e8c25e9f296 SHA-256: 0282d620f1e12a456fbdb0bd6711225871c37d376184d4d7b86659624d9c5c3a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous external URIs pointing to compromised WordPress upload directories. These links likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5dfni81eq4ufihu470k2kgdvon/siduwojemewede.pdf In PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/fb729c7a3b32402e2ab62c8893f833cf/17153371324.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b025c69234---95745112075.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/3264acfd6d06ea9022ba0310a4cc1e4c/ditutumuxilubu.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///muwatedew.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/radelomam.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/gulemukabegudasewojurewat.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/19512185442.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/mideketaxixafuzuv.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3disjrgkh8jgq0siifbht6ic1t/mulipunoxuzugapimuk.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/65123102142.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b603e8b8d310bd172324dec0884b5fba/19993570633.pdfIn PDF document text
    • https://clove7.com/userfiles/file/torexofixogado.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/e45ac1ab4b80b819b8a480dffed475b5/gozorizikaki.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/fetasumubojenarat.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a323f0a5d6b---lasotesesofosave.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6922427f827855f8b17a03cf5c93f072/62331394199.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a355c6d1dc4---jivewimazuwefupawa.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160968fb2b428c---12480424543.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/wiwejudikapujab.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/6759273474.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/s11i5hof7avc3e235pp7n72u41/buxuramezarozedubidixapu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7070deb4---jazina.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/n25uic5en6aqqod6cupu9t8mne/36726676012.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca38cab3c---68575252521.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ff1b747dc---93756841003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+spangled+bannerPDF 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_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 16696 bytes
SHA-256: cd036a3d17a8faf49afc4b7ec71a49f980d7f99588caa8da50b74804dd53db01
font_01_sfnt_off00011a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322F 10464 bytes
SHA-256: fd64d44e7f4b12d5cc843d1123b4d54db5d6b9ce03eaec8eec359eb77a351646