Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca3d69eb7c6f4bd…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 14:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 229d6d51db55b489343b026f17d92f78 SHA-1: 7b94822cc695689683b78b14e96f3f27b4958f4f SHA-256: bca3d69eb7c6f4bd05fd58baeb97c98050f38137caafaf5d99b18da8f2045070
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a domain likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to nursing studies to entice users to click the malicious link.

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://seumenha.ru/award?keyword=appareil+urinaire+cours+infirmier+pdf
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5ff9e91f6945a.pdf
    • https://cdn-cms.f-static.net/uploads/4500425/normal_602fcbc9d0e79.pdf
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fc668cc68ffa.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_601f2769746e0.pdf
    • http://tiktokfrance.fun/tedopuvevatu0ry.pdf
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffc819498ce3.pdf
    • https://cdn-cms.f-static.net/uploads/4474449/normal_605f3a5ac4ceb.pdf
    • http://kilebekum.iblogger.org/ceros_dan_batozar_gratis.pdf
    • http://devgm.design/ganipugonixijivulaz15mpf.pdf
    • http://soul-felt.com/petokatuwasajasolap1h28n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_1e519c1d19a042e79e9a28e18cf56115.pdf?index=true
    • http://bexovivuvere.myartsonline.com/conversion_to_word_document_online.pdf
    • http://bugazepoja.onlinewebshop.net/grounding_techniques_worksheet.pdf
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_cd84b35a3c9c490388bfee11f4ac1307.pdf?index=true
    • http://jajoxutevo.epizy.com/brenda_fassie_black_president.pdf
    • http://kubazemaxem.epizy.com/53090541901.pdf
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_e48adce6eb9443e7910e3147e5e7f3d3.pdf?index=true
    • http://seroritubofa.atwebpages.com/xuwubutukusotediwub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a5.bin
3485d0883cfb6f87e68f821a90695b29652d3ca8a603f4fd55d83e39032ec13a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 5288 bytes
font_01_sfnt_off0001078e.bin
33af6589bccd32b261b697ebb1727a8b961b29ef083e08431b381a4748e01d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 11680 bytes