Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabb5a11d2042764…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 10:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0226e90114b7c74fa3fe301880ff22ed SHA-1: 33ca07e28657c2ea144a6e6a05413a00168d3c65 SHA-256: dabb5a11d2042764d891f50762ea2c80c9bb420e5857b6ebb35b42875d4d761f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests this malicious intent.

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 https://drafthe.ru/uplcv?utm_term=exploratory+data+analysis+with+matlab+3e+pdf PDF link annotation
    • http://andlupa.com/userfiles/file/81640138409.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/tagelaz.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/b2cv9r6tmi0ietc0k44m91ctn1/88267876865.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/97a8ecc297775735b5b086a513da5e6a/11830420795.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/97333808427.pdfIn PDF document text
    • http://labonscafe.com/userfiles/dijizuv.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/buguxadeputivojovepip.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/95053876160.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b325ba3bdd2c15148c1fe8749c2e68e2/46614045673.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/kuvota.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/30166588493.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/depuzokugixoxesatowodisu.pdfIn PDF document text
    • https://aaaxxion.info/images/file/fulumesogutuburegibela.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/33550063004.pdfIn PDF document text
    • https://ayurmitra.com/files/file/mimeze.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/laxope.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ddf97861---digizekezekes.pdfIn PDF document text
    • http://vkts.se/userfiles/file/xixagus.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/18u7liv4se7mtrcqu9c1s9uqmk/tixavilofuriwilolujom.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/92016483487.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/zaferikij.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202107/file/vekunoxap.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130d5fb227e8---mutegagugafetarexanoka.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/wazuninajefafav.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ptpik931a1r25tlqre3421i6e0/karisafapodepuboruzirape.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_off0000e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 11360 bytes
SHA-256: 132e66ec09fb6c10830106a87176234526136fd6877c07e96a0aac47d6278161
font_01_sfnt_off00010115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11927 18876 bytes
SHA-256: 55fcf3a980331374f84f86ded8c771d15505451bbc9f80ea368a973c5b038a7d

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