Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3071996299c656e…

MALICIOUS

PDF

96.0 KB Created: 2021-06-25 17:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afd08562784ab3f8134c950cf6a1d702 SHA-1: da8ef232970f1e3e9fc39dcf9a0597ddc115b7e8 SHA-256: b3071996299c656ecf90ad31923b3433378614f9bedf69a14eddabe3bfe1b250
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://infrive.ru/uplcv?utm_term=meaning+of+cardinal+points
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a06de30ce5---5491012291.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074a7fba85ab---doduv.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ae729f5fac1---9493845642.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/nixewugako.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882f9cd8212---83986677705.pdf
    • http://alfavit.tv/userfiles/file/12431063339.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/uie0c47dv78u93fon5ffa4j77j/pitowig.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ac1b0d279---gevajepirajujo.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079555d9f525---30571714044.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093b00bdaee7---xinapos.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/da01574eec8a2b478d41949cd0e3b768/vowexepetebibajomaz.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/e0942878307976566b5158577ca22736/nodibidupabolunujula.pdf
    • http://vksraja.in/fckeditor/upload/file/bopufenefusesejil.pdf
    • https://eyetracking.pl/userfiles/file/80563762285.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc13f8dede---sefuvasefixotam.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/501263eb7df1e974818ec2db7642f8f3/fuxaxuperuw.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9449c1f9cf---bedexisax.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/jl5mrfqg4o06ld9dmd1q7g7dg4/xikol.pdf
    • http://aylincinarli.com/fckfiles/file/26866206415.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c49dd7ac994---53181362379.pdf
    • http://blbr365.com/userfiles/file/1621497191.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7329b696---11843403286.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098845ced1ab---bajimalufukepapo.pdf
    • https://mosconi.net/userfiles/file/zegilapijitoj.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a6.bin
89a9dbad3629d110c127088308ba07a7485e5e971c61f56b1788a19130c933b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 22452 bytes
font_01_sfnt_off00011d51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D51 16792 bytes
font_02_sfnt_off00013568.bin
a76f326f457511ae99cdce438a9e359e17954686730e5f12d1bfea739161026d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13568 10788 bytes
font_03_sfnt_off00014e1e.bin
57a5a38739959dd9a23a1f79cd8fd3ff8b42d1d099c191ae141f5b3fc5164579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E1E 2448 bytes
font_04_sfnt_off00015891.bin
0e626d1f88b2499e60e7989f956b4bde842106bcc7d755090985c0d92e6358b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15891 17208 bytes

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