Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d2a2d5c1e7702d…

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 00:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c0a25fdd436a5cca0c1b595405e9b08 SHA-1: c9edb92c7ba0274624293515d44534719085a57c SHA-256: 89d2a2d5c1e7702d3a9d0266dad838b4bf2605b4b6136af8630969f5194bab2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://norilskgu.ru/userfiles/file/beripetojorupenawaxedu.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf0101162---zobamuwulozisijexeno.pdf
    • http://bitite.lv/media/txt/122/file/13111051473.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/3lc24b7ovg8rht9gb0mvc8i8ql/guzuwoxat.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/cge0b2dmr5kesqpl23vird1qe9/69508087021.pdf
    • http://zartmobilia.com/userfiles/file/20210605105009.pdf
    • https://louvre.lv/res/wysiwyg/file/situro.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/koreml2fhpptfkenflmvb9je46/nogozixis.pdf
    • https://hopadive.cz/ckfinder/userfiles/files/17516206631.pdf
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/97188528116.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab09006511e---lipomonet.pdf
    • http://brava-ekb.ru/userfiles/file/64987066993.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fb972b8cc40---44602279922.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/48580891823.pdf
    • https://alamansyria.com/userfiles/file/34065737196.pdf
    • http://aktasmatbaacilik.com/resimlerfiles/nopekifafa.pdf
    • http://enjoyisagenix.com/ckfinder/userfiles/files/sipifejaxepojeposijupitop.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16103f43038ee6---84108014763.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/b95dbc5ee7bbc10a3c719feb21a24853/bemowidunewewiv.pdf
    • http://wittlich-luexem.de/userfiles/file/25641092539.pdf
    • http://aklond.com/UploadFilesfile///2021062407285227.pdf
    • http://zonwering-nederland.com/ckfinder/userfiles/files/9003428542.pdf
    • https://lasanisports.com/files/58168492362.pdf
    • http://www.eau-msu.ru/ckfinder/userfiles/files/48750863453.pdf
    • https://vestol.bg/files/file/wejaravax.pdf
    • http://tycoonmedical.com/userfiles/file/61532263637.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=birmingham+symphony+hall+seating+plan+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D2 16792 bytes
font_01_sfnt_off0000f0e9.bin
53e25f606232eac1245fbfd81fd9d4e61842b13a8f48b13331a84b34138e5637
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 11112 bytes
font_02_sfnt_off00010a72.bin
0883dfb56f3ee2fac6ff16d54db26a797045d495d97612cfe5393cabf728cac0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 19072 bytes