Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a80c23f31264b0…

MALICIOUS

PDF

81.2 KB Created: 2021-07-02 23:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb20c5a5339c3e5e935e5e26de53e7ef SHA-1: 0e0e7fcecd9c8f2145d33eef9378b20904cda63c SHA-256: f2a80c23f31264b0504d803dd995276005d8ad73b2e3570a8d6f4d0455258bd6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fertilizerproductionprocess.com/d/files/47508530903.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/2f3abd3a3324d923a548854b0514c99d/65066274918.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608864a85706e---78865652797.pdf
    • http://speed-r.com/js/upload/files/dagopifef.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b651485c2---xelokepoxarowudomigo.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a113d0ba8---59246736628.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32f3c446b4---tiratonovamurujinegi.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7a79d87e5---wikenebamafarevezor.pdf
    • https://arch.ua/ckfinder/userfiles/files/fajozopuril.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099e9f669b79---84868683670.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d4f9710c0---mosolofakijomigun.pdf
    • https://imotrading.com/images/userfiles/57253115916.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099aea5c5e9b---29949457025.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mafk6c30pf04nrs8ilk1f0q2e7/bepeleluke.pdf
    • https://cochleartudaskozpont.hufiles/tatejojot.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/2b20989f16ddb706cfb6b5268732f050/89763273543.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6e7f3b5d---44456294944.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/777101a520e6454da4cc3a79449b8cca/48224816523.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/a16973d6bc3f5d3350bf837d41ec3d54/kuvumobir.pdf
    • https://dla-pracownika.pl/pliki_user/File/45031368626.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d766ba0c15---tekejuxevozelejar.pdf
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/82344000113.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/36f9bd676765dc77582186f1896aa68d/xokegujifa.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/eaa6b7ad2b0d0d6b34ab8c59b39bf265/sunesovefodujavazowuro.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+1+barbie+dreamhouse
    • 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_off0000d120.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 16792 bytes
font_01_sfnt_off0000e932.bin
6a5d777c5199636be6d4646a4658fdc5e3971bd77cef5a0b62af26296b00f04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 21328 bytes
font_02_sfnt_off00011d55.bin
f929b298f02095e74a1c9681e25fdf26de00af5a035602ec66b0cbc81e5b48ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 10644 bytes

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