Malicious PDF — malware analysis report

Static analysis result for SHA-256 81655e9385f8a14d…

MALICIOUS

PDF

68.5 KB Created: 2021-06-01 07:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c54bbf365a8e4a99c1a52fecaf11c7cb SHA-1: aede9c74f095e6267bccd193a5b4c9715c2a8208 SHA-256: 81655e9385f8a14d8c4ba5a0176a222dc5c6d9197bd32b398dcec3362459609f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to formal dresses, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/123?utm_term=formal+dresses+baton+rouge+la PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4450440/normal_60b2825da0839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_60393888db7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_6019798d67ac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_602b618bf22ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444626/normal_5fcb5fe6dcbe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_6069c9c5dda49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_6055824be3027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_604d16e256f22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5fce2f178a4e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144440469/homophones_and_homographs_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8407e0-990f-4094-8dca-a20645d0c47a/why_was_johnny_depp_pulled_from_pirates_of_the_caribbean_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da821268-851c-451b-9269-36489beef470/jifumejoxenukudanone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ea7492-b66d-4229-8125-7873ee4ef8a8/batimajotuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a8c681-84e9-4264-818f-b9de19f8bfc4/bob_proctor_you_were_born_rich_workbook_free_download.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/what_are_the_benefits_and_harmful_effects_of_bacteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84588a1d-7593-4969-87fb-739766073758/34596971768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a395c0-e9b4-48da-9719-833b50db864f/44018835785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac7e163-05dc-453b-8c8f-9215073cdf4e/7403353471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae8071a-aa13-4af4-9a00-dd82b4407ea2/the_vampire_diaries_season_8_episode_14.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144438543/56981623970.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 5240 bytes
SHA-256: 6fe6d16f10ea3d1f456b0df3d8a90c51819cf858ba04bcc53fc1a96bfb00a2d7
font_01_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10084 bytes
SHA-256: 361f27af78ae05fdf7fffb21f06823c3b17f34412f7da54a38d56c5b28972cab

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