Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad240718a467eaf7…

MALICIOUS

PDF

87.9 KB Created: 2021-07-23 13:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4f5ab3c0a0c15f22765474876a2e5c3c SHA-1: 5742a8fd8d7c0018e566f4a9beb248156fa7f00c SHA-256: ad240718a467eaf7d7caa3dc300e41e44a2fc61d9c86721119add1a1de045de8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick the user into installing a browser extension or update. While no scripts were directly extracted, the presence of numerous embedded URLs pointing to potentially compromised WordPress sites suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ab15e1a0c---64592532515.pdf In PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608266e00ae16---lemaduworefanolakep.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/7397355618.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f0273d00083c7b17cb5c262892fe7135/11381083818.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/45809428975.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b669a22adfb---59445648868.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d891ce6824---60666518276.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/n6r4m2qnc1kr3r3gqf3bk2e69c/xiwokatinodosusosorob.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/riwijisimezokakeg.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/xibaribez.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/mb288q75q7l4il76fn2ml1mb5t/89289840969.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/37e9gct348pndab358ck1buuv7/10837162373.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/vedetimezemiwofi.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/56863696115.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/13048988945.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/55498430350.pdfIn PDF document text
    • http://wsm.hk/images/files/zegovisodejukem.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/xuzupinutiwuje.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/52060378612.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/vepulezogedijolulemet.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/82025650255.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f34caf6c1a4b085f34a1b66c593e4f1c/ketisodebiluv.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/zalirufituvupemi.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wivefut.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2hj60ml0ejn7oq98uca2430tq2/340746291.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qol87ffplhgiodcni6lamksgui/1606282723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=agario+private+server+mod+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_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 17792 bytes
SHA-256: 5c13f6073dadb61db0f433b87aed3785ac7f9d9e702899af28b0787069844ed1
font_01_sfnt_off000120d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 10868 bytes
SHA-256: 8d86771621d801b948ca2128e54d6581ef627b6b44f138170bb2d6d5ebde4cb8

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