Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7827fa7ea464c6…

MALICIOUS

PDF

86.5 KB Created: 2021-09-06 07:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d57747b077ff051d8c6dbb59c388d083 SHA-1: 93aca6d57b88b0e371b1f2fcd568f813dc809813 SHA-256: df7827fa7ea464c69fd1e0e41fb26d57cbc076d160b23f7d390deebc0b3d7a0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of multiple links and the nature of the hosting suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://china-miyaco.com/img/file/20216219143.pdf In PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/sipegepesofuzosofu.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/aljbqhp1a6mkfk2o3oe7c1ed5c/sazamenojonujedipetete.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e912615b5e1---baxizef.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/lamutevimet.pdfIn PDF document text
    • http://amandamaitland.com/images/file/betekepimudose.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094136276e93---daperazubupimebumenofud.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79dd8809b---91574137856.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/niwigukulupavapuxarovut.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6da30d066---marigudadupabamakozujinen.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210714134520.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/94233937067.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/tuzizuxanapubudunopegap.pdfIn PDF document text
    • http://gotween.com/userfiles/file///71233216847.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/68798199339.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/1268050256.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/89452955616.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/44185749147.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/36422230926.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/sexawujozakamaxivapobe.pdfIn PDF document text
    • http://www.ezmoving.com/file/97376295764.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/rafabogojo.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/raxoxelopofu.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d003023bab0---funip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=investigacion+sobre+el+tabaquismo+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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 11368 bytes
SHA-256: 40b0b35aaeb29d42d8a770384cd42fcaf80edb0e0ec37536cde726e0810a8a1c
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 19784 bytes
SHA-256: cb8638d362e9b16ab14a538331be222a3abe2bb64d1e4a705c5a5e7470333442
font_02_sfnt_off0001343c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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