Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc180ec42a69142…

MALICIOUS

PDF

77.4 KB Created: 2021-05-06 23:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 25ad21361e804a76ddfd33df910fea28 SHA-1: 50a2dbe002024dd730e3bad839d5b56c4bd08a5e SHA-256: 0cc180ec42a691428475eed0a5242e8ec016ab385176bce1a723d39f65f7ee25
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/uplcv?utm_term=algorithme+et+programmation+exercices+corrig%25C3%25A9s+pdf PDF link annotation
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/497d93d99cb85ed553e1adf70a04147e/20900617396.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/2583d1d15ffa6455ea4d10546c7ab80b/12982636654.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609087c0a27b9---puvozowikelominut.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/f6536277c9e4536587cc9cc21e4b6c0c/39571861666.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/95df6d81a28b38229fb0ada2c53ec397/92891336994.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6ef82f81fc03f29f16d485d641c04b56/22253213130.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160710a29e2aa6---mobodupefewigi.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/46b5abe5a5f9d3e535544c48d59b0ee1/55958295069.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/27foand5qp0to4l9sfu8er5lsp/89429818279.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b764a4860f746fcbb81189f625be5ddf/21759752207.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ba04db4e9d7c02fb7af99106c09bf4fa/10499796848.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842d496a2d0---20566140489.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160833b0680110---20966001766.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/2c3280a02121d2ad02d1a782bbb5a092/dasuputixuf.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/sf7og8buat00ud84fam36o1scn/nakubidubinijedub.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/mavosoxutos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 5556 bytes
SHA-256: b9902b349ae60c2d569eb9cde41ecfd36bed1a086191853ff8d4dd2ab28bb395
font_01_sfnt_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 11976 bytes
SHA-256: 3b0b761dc125e575aed004b32e681e744c328e8f6a693f5ae2231df68ffc6ecb
font_02_sfnt_off000117e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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