Malicious PDF — malware analysis report

Static analysis result for SHA-256 7962ed2232818c03…

MALICIOUS

PDF

91.1 KB Created: 2021-08-01 10:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f327364d42ddcfd6a38109bb3936b759 SHA-1: 3d05dd3d6020000e94e771700c5f7ae31e7bb7f1 SHA-256: 7962ed2232818c03eaf6f20a36a88cd303409b3fa4bc67de8a225f3df1bd2db6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading malware disguised as a game patch. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=diablo+2+lod+patch+1.09+download PDF link annotation
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5421021b9d540037a2055d2f45fea47c/ravitidimuripotapopukotop.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8d2a94a4db0ebee427609fd42b734b57/80751194647.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d6d89c1bc50445f62b8ca4cbbd426d31/61184630177.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/49095357923.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d5bdd3c8d17f8714dde9640c1391570c/32064004100.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/wolutupoletivelita.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/ba364a7c9bfd03d785da33055ae62847/74828940512.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/3ab09a7ee2828b4219feb792b7bced3f/pudikoxekutowijajuv.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/toralazejugobavi.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/b54f91c8cc08fa1a3b1ef120863919ce/fefitapupovomuzaki.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207a1db1dd---vagefanasikamulikanuw.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/gifavewimumugufesedoka.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cee7f2d911---15657564259.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/xuwolevademuditisexo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67bc227bf0---vevovodevera.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/43857275632.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5ntljac7saulenaspmg6hsmqm6/46061597848.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/20760711107.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/baseterawotonaxiwedaxid.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e2b2fd54aadb39649bdf40c154317c4f/jamukofifevenopapafa.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/gukujogetuwajaxifabize.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/bamusewejexaxofegujaxu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baef8dac271---85459975916.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608332bb54c71---83384245224.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_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 19072 bytes
SHA-256: 208f9431433bb26b9b82d3fb62d64773dde7c2a7f456f74cf2769c3c9efc0df5
font_01_sfnt_off00012cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBB 10968 bytes
SHA-256: bb103e8b650297760d6f5da9bb95a407258a9b509f53eb7a612586955bcaf5cd
font_02_sfnt_off000145fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1