Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfb00b2098f1a35…

MALICIOUS

PDF

85.1 KB Created: 2021-08-31 23:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a4a0c0f9112145c17a4c7865ac8c3ed1 SHA-1: ebc742ea8ecabb63685381e8a67de3f11398acc5 SHA-256: adfb00b2098f1a35fe22ba8a4ee22fc9690fee437e71835caa0a27a7697e8fa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a likely attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://traveletrust.com/basefile/traveletrustcom/files/pavonuvanubesarifonixema.pdf In PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e53b1c08312ec61de74dd9314d8b643c/mitukotiletoratunivo.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/9ea2001835504c068563d0bbe02d94d3/mafomevijejadumipemewo.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/mavug.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c04a84a70---suwupilavapujufatak.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/d38cf9f013fcf776155ba4055f8d8ff9/fawovuwebiravimub.pdfIn PDF document text
    • https://amblamy.ee/upload/file/61308157405.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/15311715306.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/88593300226.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/zobiwov.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/dafad10994e25f55644bccebf834d19e/53329363068.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/77911730511.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/69850989378.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4fdc355c0---20700861700.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/82071152428.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/29432260584.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/70635214441.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/6a309c0fbcd02f3aa868294d34cca17a/lapakofapuxirofonigij.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/negaxuw.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/labivomazof.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/sufulitegamitim.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e9c83d819a1be61a7f8e66b43f2700f/3843639183.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/16fg6jcagbu4mdtgo7edqn5mct/60889974838.pdfIn PDF document text
    • https://o-dance.com/upload/files/rilebidumepemoveru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=baby+lullaby+lullabies+for+babiesPDF 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_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 10412 bytes
SHA-256: e0b7e93480a1cfc4f07ff765e3fd68feec971fad57d00399501909ded4734bb7
font_02_sfnt_off0001179f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179F 17688 bytes
SHA-256: 55760e18885ec828db2d2c869cf0a5e66c9c9f2edf1698fc8be791c3e045d924