Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b475d7f4b3593c3…

MALICIOUS

PDF

106.7 KB Created: 2021-09-03 16:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7dd18ee4fb53a6fd155679d58d606e82 SHA-1: d84f985cbfe01e88131288f7a587b33d8e62cc84 SHA-256: 1b475d7f4b3593c328bb039d5ade730294bf3dac3ae4c2e5fdfdb0c1aee43e58
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac010d0841---fobeletujaxigiviz.pdf In PDF document text
    • https://ccaquebec.com/userupload/files/50113065911.pdfIn PDF document text
    • http://tms-operation.com/upload/files/jovizuzilifoxafogidaxesus.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d809841dd1---64553660614.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/tunopaxexosaxewom.pdfIn PDF document text
    • http://domplus.su/userfiles/files/xadufujeganawefo.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/67021997936.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd223245ec---58696656241.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076041856a99---64570462138.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f15258225b---nonuzaxinabifunosuxi.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/gabibetinopobewekinozata.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/20024453989.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/435e4bddf73f70528dcfd1b658441c6e/68360347407.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989c51b3a7a---40279135791.pdfIn PDF document text
    • https://thietkevuphong.com/uploads/image/files/vepubitizazato.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14a896077---87275841426.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608661440b2ce---12953455952.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/3ccp1boss70dsalkq9nfdtpjh3/fidovugejebije.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/87377684863.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/80601301171.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/sagafoxer.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8b743dfb---bopimuzefoxozu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161206ff58c686---witiwotisux.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/fosudawari.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/36260450456.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/refiponilerilunilisekupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=orissa+super+cyclone+1999+pdfPDF 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_off00013840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13840 10972 bytes
SHA-256: 4738a16dabf8b3a2bd6b434bf167e2ba303c1c6437097e45ca8a9a122b4edbb5
font_01_sfnt_off000151e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E5 19444 bytes
SHA-256: b84847f4be8dc2bbaeb4b4e4cf5cf045b3088d627f34e3d4ae1e0b792ef277b4
font_02_sfnt_off000184d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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