Malicious PDF — malware analysis report

Static analysis result for SHA-256 01949b8fa9dbe8dd…

MALICIOUS

PDF

98.4 KB Created: 2021-08-18 06:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74a46645141845492eab86a7525d9f73 SHA-1: 71c1c8bf1da699b25860f37e2255df97874c31df SHA-256: 01949b8fa9dbe8dd61706fcae6c8a701c7e6b8b99df2b4016e0c7e6fa40a0543
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The document body is unreadable, but the heuristics and URL analysis strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/p59umng7hl21993k2q1qb95ocb/sofufezatipesasasenupega.pdf
    • http://monkey-do.net/userfiles/file/11724882616.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/750946b28adf53586ff57f6a92ef3af7/66577929102.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/0095b4dd0d446b603bcb165aa14c48e4/dixebedizo.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161155a0464a15---55658726926.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a384f091abb---94916939241.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/jv0g1ai4pbjsas52k0p9fli8db/takurevigi.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160947fd439cef---vosinasoxuvekobisa.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/619b4f23171c844b94ab224cd159eb21/71131613539.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4062396c5---masonunowuvax.pdf
    • https://prawobrzeze.info/userfiles/file/61941444835.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/b5078ac26022f57c0547d126cd042f2c/vozupoded.pdf
    • http://urbancollab.com/userfiles/Proj_Name//files/6149859766.pdf
    • http://megalaserasia.com/upload///tiboligabev.pdf
    • http://tremonttemplemacon.com/clients/862779/File/41484553787.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f099c8232---6424966795.pdf
    • https://chezgregoire.fr/userfiles/12601139538.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795d52c587c---33649744336.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc144b5d4---14666057293.pdf
    • http://mopron.ru/upload/files/25835669748.pdf
    • https://3drm.bg/uploads/pictures/files/63749483517.pdf
    • https://arte-salon.ru/upload_picture/vozuraza.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b35521d22bb---39465250382.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kik+messenger+features
    • 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_off00011adc.bin
edbfdf3c8aac5a296a842d205e79ed88229ccb8e2438335efc439cd292777dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 18612 bytes
font_01_sfnt_off00014b5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5A 16792 bytes
font_02_sfnt_off00016371.bin
e95debbd3fef43e1d75126abf0c32b75d78d998d7bcf84012fcd4e1626782825
pdf-font-stream PDF embedded font (sfnt) at offset 0x16371 10572 bytes