Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f22ffd7add78e4…

MALICIOUS

PDF

108.0 KB Created: 2021-06-26 03:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62b2be5b46baa5148a16ddae1db6efdf SHA-1: 6399febbc9db972a4e2f81eb41e4c693c72532ed SHA-256: 47f22ffd7add78e47af94f3d0a110ed5831be3bc005f9a5804952a5123d9322b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/sdn2dq16ftec6rofqbpf3ulos3/juxowa.pdf
    • http://al-bandak.com/userfiles/file/97127369280.pdf
    • https://augsburger-dartliga.de/uploads/file/bulajebagolaguvevevi.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/0gnmssfpldcrrlde5ulle29p46/32980523061.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c474bb992---topajubowoxetipebe.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b14b1792fa---kelulofomatige.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/12bc6de0681b71cda2c6149cb6504f65/pesexujepifetifefafot.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa20267fe1---bogatamopakex.pdf
    • http://tulga.ru/editor/files/11432603375.pdf
    • http://altaprecision.com/userfiles/file/bukiketofewafimevuwalo.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/v0c8jr3o4nafrnmfm4f4r1fc9b/nutinunomor.pdf
    • http://umrllc.com/userfiles/files/vekamogede.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab94741fb61---2406175160.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/2a012e640c2450bcde5804000b77f260/23767133947.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ae6da1b1b7fe4a5b8b982aa37486c4bd/wikufogasuxe.pdf
    • http://odnoklassniki-files.ru/images/uploads/files/14306354398.pdf
    • http://2ds-creations.fr/userfiles/file/47491517137.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160959d79492da---soxojebelu.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/brv40b5134gp8vqan9j8vdr99u/16467632950.pdf
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/tozepasakadezikalena.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160988794ea0ee---15872784322.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca0f04b93398489df438bdbf9efbd547/mujiwumovifip.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=css+first+and+last+child
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d232.bin
15404e70324b3eba215dbb3f5ae6bd9045ff337f4428d3648a750b6a9de9b77e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD232 17128 bytes
font_01_sfnt_off0000feec.bin
cb774e309da1ca3482caa450c3d8eaedf6e39f251cfd4ed9f6341db4d7ee266b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 10352 bytes
font_02_sfnt_off00011626.bin
67ba4079aeb5b773b0360b5d2232f0e5b9ec61d7d8b7eb4f31112b18e7916213
pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 43132 bytes
font_03_sfnt_off00018a6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18A6A 16792 bytes