Malicious PDF — malware analysis report

Static analysis result for SHA-256 5944ce78c4411608…

MALICIOUS

PDF

82.9 KB Created: 2021-09-09 06:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6dcb8243b3305144dd696de48e5719f8 SHA-1: ab70fdc80579f9ccb5ddcbfa8fe3fffdba43fb45 SHA-256: 5944ce78c44116088782e79b6939f2e9476499c3363f8cc42370a39041b19d22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggest a phishing or malware distribution scheme. The file's structure and embedded links indicate it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://wastran.ru/uplcv?utm_term=videoder+2021+download PDF link annotation
    • https://santechnikosdarbai.lt/images/files/33522625252.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee52782c0d---57074447195.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/59153344203.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/ripajajerapezowusogizuwat.pdfIn PDF document text
    • https://campermagazine.tv/public/file/25850859891.pdfIn PDF document text
    • http://sakra.sk/storage/file/3401991002.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/netuviwejebegifefidepasa.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/7dd8ddf5a7b46a325e74419726a4e1a6/91688229327.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qbge9midl5cvkdsgu2i7h4er4m/xutilarunixenerox.pdfIn PDF document text
    • http://allycatering.com/userfiles/95559942197.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e1578b65f---60392179786.pdfIn PDF document text
    • http://zamaro.cz/images/fcke_files/file/jerurexisupakutadibibeve.pdfIn PDF document text
    • http://congtyvima.com/images/Download/vejulozogexamukizosomesen.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/vafokevuwugar.pdfIn PDF document text
    • http://bulmarconsult.com/files/juwutavebovutesetinixevul.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/babudekivizakifivowefan.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/83357914161.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/lodox.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135ef5f7f684---kugenamabujepelojatop.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/80360471464.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/23956812250.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/81586653677.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/60144904101.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/83585123506.pdfIn PDF document text
    • http://ilkemymm.com/image/files/ludokodetu.pdfIn PDF document text
    • http://anpharma.net/upload/files/95695659625.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 10324 bytes
SHA-256: 0a4aa40aade60c3f499ebc24a439992e5a202576f2c9784dd2f3c6999d3d9424
font_02_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 17936 bytes
SHA-256: 8c5740c686619f6ba2a8c2545415b8da50cb03d95f269f9506772e6586d9454e

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