Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece3a7fd7f372d59…

MALICIOUS

PDF

69.8 KB Created: 2021-02-18 18:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e67c3ff17e5056ca7c4a7abb7426a4a8 SHA-1: 2c5b924250b1330c6a34ded4d7fb9a98088c035b SHA-256: ece3a7fd7f372d590a16d1799246d94ccfad63bcc5442dbf1f1d6e552e06a24e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'workout guide', likely to entice users to click the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=shredz+gym+workout+guide+female PDF link annotation
    • http://dazinifuxevoji.22web.org/jofevedubupiriropepeped.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373788/normal_5ff4426cf26ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5ff546227b0da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466664/normal_5fc94f1c63f07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5ff79cc5df5f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417216/normal_5ff77817e83a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_6005fcddf1ea8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuparol.epizy.com/regarara.pdfIn PDF document text
    • http://sesiperuvi.rf.gd/renet.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/eclipse_oxygen_4._7._0.pdfIn PDF document text
    • http://fomariwidodazum.rf.gd/bosch_tassimo_manual_utilizare.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_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 5556 bytes
SHA-256: 85f8eee847e7a65cfb5e3c98b259b1e7a2e19ba9de5e3c22adfe79b01630f5ca
font_01_sfnt_off0000e729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE729 10404 bytes
SHA-256: 4c4be03677efeef31283667390926f919344f191eeb90a3154177ca18957cd02

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