Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feef4724725da9d…

MALICIOUS

PDF

96.0 KB Created: 2021-08-21 06:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f95319c93e6241ce96f360022a7e1bf6 SHA-1: cb4111b8ff4d9616f2386bc5a8d92117f285a883 SHA-256: 8feef4724725da9ddee9fb128dfcad8d6a59030a3698683ce2dd8e4845fde4f3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or scam attempt, likely designed to download further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/78452889112.pdf In PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a318f519d7e---83997722718.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/v23453u210ks9ahpjpg52vgn55/zunirafivufaralikumim.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/es35kahfrcasi4lhkrpai2qjvr/sagose.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062319203073499.pdfIn PDF document text
    • https://aneri12.cz/res/file/noxunujogavamawa.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/0e8d0dbe573da055a35f8713accf954e/bofatixonasunagefekuvazu.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/31682136877.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a147acc3a---12601691372.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/91901185527.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1611e3d5a6afb9---sepebijegadirusewa.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/83022370301.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/77011688381.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fabe3479173---gezisuzi.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d149df9fefec9c993f72f003c522d5d6/kezimivakobirisos.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5714b2a5---74987515604.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/55034435416.pdfIn PDF document text
    • https://okvino.it/file/1469158239.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/69351901954.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/v2mba037u9g0l1orfa9ep0s6t3/96099444877.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5d9f49e586792ca7f20a68df6222d7a6/luwitafaruselifigam.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/4b50bedac56444038b17501889a40422/jenixa.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a961497f588---duxunababo.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/52373503281.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8521af44b1adb120ba19120efeb5fd5/mavesidiloja.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b52a25812---nebuzabojitavalonibiribo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=fundamentals+of+financial+accounting+5th+edition+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12972 17544 bytes
SHA-256: 8d5431f3783142aa2a9978a2dcf7f9e037a909edd477cb4b1a1a357f47a18381
font_02_sfnt_off0001573f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573F 11264 bytes
SHA-256: 859b71122fa2877105eeb89b1db170bc4d6604e4581cf81d6c7d5390739b4d89

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