Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec29668ae1552c01…

MALICIOUS

PDF

78.2 KB Created: 2021-05-28 03:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c9dc3355efcb75b73b6b9beabc0adac0 SHA-1: 4e2b5de1efbd4feea91dccd10c049b52ef60ec00 SHA-256: ec29668ae1552c0121aefb8fcefbb4c6142cc9a1e2a962759f76f7a858c8101f
96 Risk Score

Malware Insights

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

The PDF file contains a URL that is presented as a download link for 'whatsapp status video download love mp4 hd'. This URL, https://jacksth.ru/strik?utm_term=whatsapp+status+video+download+love+mp4+hd, is likely used to deliver a malicious payload or redirect the user to a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=whatsapp+status+video+download+love+mp4+hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fc6b2b5211ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_60357d3f95957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5fd04398a7dbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fc57e9a62cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_5fd16c72de0dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413696/normal_5ffce3261d995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd5276c4b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_6047a9ddf2f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_603a05f05d5b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406454/normal_5ff1c1b5bfcfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484624/normal_600304d44cb3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_60094f3970b45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369643/normal_5fe319b82d839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_603946b2d1ee1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_6002fb3737867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ccc4b1-9628-47a1-926c-3ddcf3435fd7/33831388304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304eba8b-c0e4-42b0-8a36-93b8ad57ffbc/97856138668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a31914f-47ec-4fda-921b-36b9fa50d658/62240786964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896ebe09-949e-4c55-8a98-97c0185650fc/how_to_learn_korean_language_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4488befb-8d5e-4282-8e9d-c9de07e61110/38547010917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934ffb81-e62e-4468-81d6-6fc6ba6a1d7c/bibusewisuguwevaxiromeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5cf2b1-37f5-421b-a0dd-4c75da9a3b68/48260775927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40de996b-57d1-4d71-a738-ee20705f3049/m-audio_fast_track_ultra_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31a38e5-e97a-4632-80f8-57cba08477a2/85745995210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdb024f-6f28-42c8-beb0-1341f90049a5/24767021401.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_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 5356 bytes
SHA-256: 399f919f7459965495b4234f2a38aa5c53bbbaeee8913569b782020b8eaf64a2
font_01_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 10544 bytes
SHA-256: 4e2f0e1a66ab2442862db60691bb2678697879608353e7a117f89b4208e3292d