Malicious PDF — malware analysis report

Static analysis result for SHA-256 792afaf91d881dab…

MALICIOUS

PDF

87.1 KB Created: 2021-07-17 02:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 22837fc23ba185e24350c3c856f950cf SHA-1: c5c06cf2357bebdda7ce88eb7101f3d7861f6a84 SHA-256: 792afaf91d881dab9036ade915ebf8f7c3292e761990279ad70c0d3cafd9ad0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, 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 distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9fb8fe84d7b732c8a4fc1131c7e91ecd/68228968641.pdf In PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/dobevefolas.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/7f8be23f2b39a55de66e50fb6b880471/79384385955.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/9881948956.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2adc91985fcef95aec89ca71c26a8c14/zereteveg.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160825219ace71---20781109417.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/zivudukewulez.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/28531338508.pdfIn PDF document text
    • https://codecs.roimages/file/3341460965.pdfIn PDF document text
    • http://newo.ru/files/files/15447094984.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9osqt3q2debjrq91k361830k4i/vupaw.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1h28nr3vofdrv07hs7235kfbk4/vefobepo.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/fobabiwebajiwopovunax.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210710080420564159gki2k.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160983516c01c9---texokazupefunilemekolitew.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/59361025186.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea689b35c---74473746551.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/0650797d81fbcf61d752ea9211dd7f07/71049472464.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12bbf1552a.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/79fd275a88eca2f6350c838728eb18f0/sirajegotofukekugodikij.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/vf43q569762v3p6vdn27rf8na4/ripanujigaxu.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210610_012943.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/jofj3ja7ad6fppl30avrs772s0/lefezeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=p+type+and+n+type+semiconductorPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 16932 bytes
SHA-256: d7906bc2da67912bb7e0dbce4ad6b022c0cf00dc0b346d417e95ac21027fa51d
font_01_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 10844 bytes
SHA-256: 567d6c570100752b5f9117210b704656860418951ff6069240adcb16e1443933
font_02_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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