Malicious PDF — malware analysis report

Static analysis result for SHA-256 99478098b7893f56…

MALICIOUS

PDF

75.1 KB Created: 2021-02-19 23:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2a2531c95063bb7c649ba9bdbe7c59db SHA-1: 28c797efcfaf0b1c30b3d7503dd765d684c80ba9 SHA-256: 99478098b7893f56b00d715a4c3488191a098e60c1e2006b577c0ffcd876f8d7
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The document body, though partially corrupted, suggests a lure related to marketing concepts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=what+are+the+4+p%2527s+and+4+c%2527s+of+marketing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5feee9a1f21d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_601147f28e943.pdfIn PDF document text
    • http://uose.xyz/i_a_s_officer_ka_full_form85yla.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/ihgdvgf/order_chaos_duels_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/e73gjgg/baby_shark_remix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5fc731c9ba7b5.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/jfNih1o/wild_hunter_jungle_animal_hunting_shooter_games.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/iaishbh/24860968832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd7b60de5fe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_5ff8f140e41a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasunafosav.epizy.com/instagram_account_creator_free.pdfIn PDF document text
    • http://riramemixezu.epizy.com/fiteviwog.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/trees_autocad_blocks_free.pdfIn PDF document text
    • http://bebalujoworaz.epizy.com/rajegetafifat.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 5736 bytes
SHA-256: c6c53e2426d362dd21ad774dcbf3cca285337255dc681d598762fe20e9a790c9
font_01_sfnt_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 10808 bytes
SHA-256: 287c51094aae2c337c9d530424256d288676a6ff9a7363e40ecee8f09efcad95

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