Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab92c6b3c8c1111…

MALICIOUS

PDF

86.6 KB Created: 2021-06-25 21:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89c7fba3d2e09680697f8247441ce16f SHA-1: 6e036dea595a48a7afcd341b9a9723f04f0d2a34 SHA-256: dab92c6b3c8c11113edfc44551c2827a12c9a2a6367eda81c18e86a496f6b69e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by multiple heuristics flagging it as a link farm hosted on compromised WordPress sites. The embedded URLs, such as http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc21c1f34---87719657050.pdf, likely serve as entry points to malicious content or further phishing attempts. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc21c1f34---87719657050.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715b4965c37---93833001460.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ktf0n22ml3o22p4dkquecu1sr2/wizorapurojigizedotog.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1f480cae---55196848885.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/jo66fcs32hormbm5na000faqrl/27832278341.pdf
    • https://accu-split.com/userfiles/files/gugufuxuvofos.pdf
    • http://colorfulmedia.de/fotki/fotki/file/tipisitemeworezineb.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/ba77bbab9137c7e964fa50c5fe4c0d13/41113145530.pdf
    • https://nevisnews.com/userfiles/27903854366.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609428a1ada41---luvazidilasa.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084cca340593---wonaz.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5d5dd687310d22f0840fcd12b3112f75/gotas.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/abgm47k9tpidtomdo3a5qne8jv/libavunuwategalapo.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608bac5eeaf3d---tatumixomo.pdf
    • http://sanarina.de/ckfinder/userfiles/files/nofujopafik.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/faid8rctncop821j4etutamffq/savasav.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/99p11jrem754k0ogh2uf7b03d9/54795183049.pdf
    • http://teifsepahan.com/files/file/pumelade.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16086af119b945---fikaguje.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56cab5f2ff---dudigazupuzuxegazatavixi.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607798ad9d8ba---tubumi.pdf
    • https://alshaabcoop.com/userfiles/file/xatibozugiwolizuperusov.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0d6c00c5---fobujatujuraxuvu.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c7288dcfaf9e6c46333a2a3a65bbe27b/79394964723.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607904e62b721---furejemuj.pdf
    • http://dmscsmartlifeblog.com/userfiles/files/lakukuvexefakiluza.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/ad7106c86bf71b049782f0e2e845bc1d/55844141923.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=movie+title+in+apa+paper
    • 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_off0000ee96.bin
585aa5bb98c251f8ac807d27d293f7d92bea3fb4aa6384c4511449f3c2396565		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 17456 bytes
font_01_sfnt_off00011c6d.bin
22366190d1f02a4d8ded94945d8bdb4b860b707f2097699911ee71b5ee5b707d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6D 10136 bytes
font_02_sfnt_off0001332c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1332C 16792 bytes

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