Malicious PDF — malware analysis report

Static analysis result for SHA-256 9084de68f3b17634…

MALICIOUS

PDF

76.3 KB Created: 2021-03-08 18:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04760d781c518b517d681bb60f88205a SHA-1: e91c4c320e7431342dad4e8c67fb4125c1fee2ae SHA-256: 9084de68f3b1763439da950b1c9d1143ef08a61b6ac3b48e9c443a5a9dc86622
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://dafemum.ru/wix?keyword=ww1+study+guide+chapter+13', suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure mechanism.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/wix?keyword=ww1+study+guide+chapter+13
    • https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/2346102.pdf
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/9937320.pdf
    • https://xabogiseduwa.weebly.com/uploads/1/3/4/7/134717421/5ef64eee4.pdf
    • https://static.s123-cdn-static.com/uploads/4375351/normal_5fe3b9757adad.pdf
    • http://arenaprobet.com/auto_mechanic_near_me_mobilealapb.pdf
    • http://spindlndou.space/godazevim1wl6s.pdf
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5ff13ec3b8c5e.pdf
    • https://cdn-cms.f-static.net/uploads/4366647/normal_60297fc32b83b.pdf
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/1ff91d04914b32d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ae0bf2ad-a56b-4a7c-b0fe-370768b9fefb/mimisokarijedapeladez.pdf
    • https://s3.amazonaws.com/wibadinavosunom/days_of_the_week_worksheets_anglomaniacy.pdf
    • https://s3.amazonaws.com/feliso/boult_audio_probass_user_manual.pdf
    • http://fifusudevop.rf.gd/aatish_all_song_punjabi.pdf
    • https://uploads.strikinglycdn.com/files/e681d323-9b06-4fa1-8a8a-4392a64079ce/65356583151.pdf
    • http://japefafe.epizy.com/arturia_keystep_pro_manual.pdf
    • https://uploads.strikinglycdn.com/files/b7eadefd-ed1b-42fc-a856-1b9854e00ba6/visexo.pdf
    • https://s3.amazonaws.com/dibedamoka/greek_and_latin_root_words_for_micro.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_off0000ed32.bin
b12763960f7e72740161bf1658e93e7ebb54d33ec3d9e7df81c14f8e8a45e41f
pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 5728 bytes
font_01_sfnt_off000100d8.bin
b553aade50170a2c0f087d425a52a87816c3013df2c661bc09b97d2f94f7cc13
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10244 bytes