Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d1043efc3e03c2…

MALICIOUS

PDF

87.2 KB Created: 2021-07-20 00:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0f148a7bf0817985e1bbae655b5aae57 SHA-1: 005974d21ddfc69b608d07088852045dc8882e45 SHA-256: 80d1043efc3e03c2e80270231b88cb23236b1eb2ed00e443b3437e365f29c272
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a link farm directing users to multiple external URLs, many of which are hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://orbitsecurity.qa/pro_mvp_tech/uploads/file/togusevisedigulisa.pdf In PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/warurunowodupumosipugi.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f17f6ae1d---12994934489.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a25df954a8f---sonirotakarubikudaj.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/94426620069.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af090012830---nikora.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/dubawewapa.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2t4jegvco3uomq710kedd3uqg8/benibajujugetol.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/wasomojo.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/48003472768.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa8fb70256---60636042922.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30416cdead---nimokis.pdfIn PDF document text
    • http://bomtvcloud.com/data/board/file/20210512030114.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/8710066857.pdfIn PDF document text
    • https://12tiga.com/contents//files/kezigejowamoripe.pdfIn PDF document text
    • https://melz-feu.ru/upload/pifamusujevuwudazutoxedi.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/deburufuwopuvifagebipi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f7b383f4807f9885beabc440345eb573/8807727971.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c340d2b2880---zabanonomusogiluzirezu.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/1tonmoh99tj5jq9b6f35fk0nrp/78461214864.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/10423593681.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1626199929_5368064bf9.pdfIn PDF document text
    • http://www.moyekolodin.com/files/kivusabatigogaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=michael+caine+laurence+olivierPDF 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_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 18004 bytes
SHA-256: f567e9e4efdc153eccefc0d71b7f31f1fe10c9f8f2fc951d7cd739d18da7db31
font_01_sfnt_off000120b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B0 10220 bytes
SHA-256: f461b943628e1ef82c985ec4be0cc5f313e77f616859f4982c67c121214edae0
font_02_sfnt_off00013788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1