Malicious PDF — malware analysis report

Static analysis result for SHA-256 7813eb2370f3bdf7…

MALICIOUS

PDF

83.5 KB Created: 2021-07-16 01:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9b3d1ca5aa6145d20b3785c6d805b89b SHA-1: a2db0482bd36b8e311dbdf9e9d374c21aa6b75e9 SHA-256: 7813eb2370f3bdf75031feecfbe340be6a13d3c957e55719c415e4be290da7ce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic and the presence of numerous external URLs, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to malicious sites or initiate fraudulent phone calls. No scripts were extracted, but the document's structure and URL patterns point towards social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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) or Microsoft license-boilerplate 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 https://catamma.ru/uplcv?utm_term=caller+tune+for+free PDF link annotation
    • https://mimpishio1bet.net/contents//files/tewuganor.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/29cc2a842ea07cbf4de0de0626f8d882/xetuvizagawarufebipijux.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/1dae5313ef7084cbb7ccd750fac14c0c/93782568484.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/a1lqurp8fdiptu9a5bi3euvl11/48690550322.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609559be605d4---pisawawe.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f22b1fb6f90870685ff837d38323fc66/wuluzafudiguzo.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/rewawotejedazovusuleni.pdfIn PDF document text
    • https://emprenderem.cl/files/vuwaxasikuketuwefufanoke.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9456c4497---jonimixuguvawi.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/cee6bf1c11c201334b9fa6281231055c/loviledidaviliguf.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/93457852965.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/30432237222.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dco08iusmvlljpb0jipo192563/rumokaza.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/rixevivevipebe.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c30c2a14511---47750085195.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/21389a61f2b14a4159081fb225e20f19/74118881262.pdfIn PDF document text
    • http://cartopack.com/Images/file/60380486021.pdfIn PDF document text
    • http://k1a.ru/images/files/file/miduzomuxinuruzako.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca476e9b3b---fojefinizolifovusi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/q2as037f5khefjjd4b47m98dp1/votogemoj.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/pebejanutaleboweviso.pdfIn PDF document text
    • 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_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 17016 bytes
SHA-256: 6d0bd004060579bbbc772a1c4eacfd77393ee712853a058d852f9c9b8b14e5ff
font_01_sfnt_off0001126f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 10080 bytes
SHA-256: 84dbf2b0cd3b3059d39867e4434481822fe62368e3e377547fc9fdb7a70e5492

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