Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c1ff85fc4da268…

MALICIOUS

PDF

81.2 KB Created: 2021-09-21 01:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ee94a3201fb51b3da21203dd65d16681 SHA-1: 33f57c409770b8b0cf8d7eae03e2d4c943e649a6 SHA-256: 12c1ff85fc4da2688222f14305bc5138ab0e36ab793e7194c770e94ee1071d68
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://sagarexpress.com/userfiles/file/fubibowilowide.pdf In PDF document text
    • http://klenderbio.com/upload/files/84475477831.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/wufitawapobez.pdfIn PDF document text
    • https://davaocarrental.com/images/file/62347973614.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/5082609423.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614902f5366e5---10023797742.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/42964196861.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/65324990518.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/76145723240.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/28114779456.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161482fdfc75f3---posowejibana.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f164b944dc5deeb9cdbf0a76f30cff88/83158313248.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614095919a4ef---gilusokarimuli.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/gefonixeku.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/74058905263.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/poluremijibetezuxutetemom.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/f1b83c223dcaa152e80367849515ed82/16615187917.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/97377533111.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ff9519105c83a3889641ba857fbcd95c/diwivokagawovagibubijexif.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210916065604.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/16770894449.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/vivevaxadamiz.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/dolofegabexujamogumab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=putlocker+movie+websitePDF 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_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 10608 bytes
SHA-256: 0650e5b2a2c3a1df7fe826cef54d2ab306d4a030e9ff20135bdb46147b4ee43d
font_01_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 17076 bytes
SHA-256: a1b38b34bcbf4d3d7c8f502f4bdd01fa53c179b015b2f38edda2e70d17ec75eb
font_02_sfnt_off00011f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.