Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bb7117db0eddfe…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 04:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7254850522187c53c0761dede5e390f7 SHA-1: b6880a478b4100f8d3e3a6d79ddf145ff188e16c SHA-256: 74bb7117db0eddfead530962bff61a64ffa80b91474f3a540bf8ad64c8d8f952
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the structure of the links suggest a coordinated effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc39ec9920---xuduxegarudonoven.pdf
    • https://curewelldiabetes.com/userfiles/file/wozerizux.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081d48e86908---81479641561.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/b7669f92331a918cf5d676a59a1720c8/602531783.pdf
    • http://banghetretruc.com/media/ftp/file/mefixilaxulavanelivivaz.pdf
    • http://whatifitspossible.com/ckfinder/userfiles/files/zebanuwewuzi.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/gumubugusigelag.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2651eabda0---72924674270.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c07d17dad9a---subilulod.pdf
    • https://handientu.vn/userfiles/file/73323391235.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/q2vg4vhcc6n9rbcsdk4okjpa88/12451096575.pdf
    • http://energo-market.ru/sadm_files/30508400411.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/32fb2238e4f5ba0a9317f3d4580c9034/83876586634.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac697829fe7---36861218765.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c31ca43d7bb---josukewojetupapusafon.pdf
    • http://guides2alpes.fr/uploads/file/39956485168.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6534bfe36---zakit.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rujivipoguk.pdf
    • https://sanaspinler.com/calisma2/files/uploads/firimelafurigadurewibe.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pgc4of3hadia9siiktvjdtbps5/wizoribabawexugosuxowujav.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c564f299d71---vumutomosemutub.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=zach+williams+and+dolly
    • 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_off0000ecf7.bin
fdc38b448f3ed4e0319e4bd68517e62ae0df2154d125f028bf4057fbb858a3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 10468 bytes
font_01_sfnt_off0001049b.bin
cbd75032bbd9a0c245618d245a7b6e2761a60289953dc8cb3a92c9131a4108d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 17872 bytes
font_02_sfnt_off00013359.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13359 16792 bytes