Malicious PDF — malware analysis report

Static analysis result for SHA-256 181354736e9a23e2…

MALICIOUS

PDF

91.1 KB Created: 2021-02-16 09:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: db4fa5b3b421dc3e5a7921601d99ade6 SHA-1: c4ef895df529271d38c86a54ca59d09fa4b553fb SHA-256: 181354736e9a23e21c75bcd2f10d70ddc15b3996d4584103cb846dfaae2e6cfa
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. The embedded URL, disguised within what appears to be document content, likely serves as a lure to download further malicious content. The presence of embedded URLs and the overall detection as a phishing trojan strongly suggest a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=singer+spartan+192k+sewing+machine+manual PDF link annotation
    • https://cdn.sqhk.co/raninogozo/BijgiJC/car_wallpaper_hd_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/djgHjjG/moto_circle_widget_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sakixowofeg/2QggZgd/51745671182.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/u50ovia/running_fred_2_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_6013dec7b9893.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/cegjjiG/moneygram_walmart_login.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/N4hdieQ/tekefurebogotojir.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/xFVAjgA/melodyne_4_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/buganabowumujef/66268242105.pdfIn PDF document text
    • http://noxudovo.rf.gd/81455797149.pdfIn PDF document text
    • http://tegiledo.epizy.com/antamedia_bandwidth_manager_free_crack.pdfIn PDF document text
    • http://jofesowevelen.epizy.com/catholic_answers_radio_live.pdfIn PDF document text
    • http://duguteterexu.epizy.com/wunabugutoju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001143d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143D 5720 bytes
SHA-256: 69ce3c80a1939ba92001b6458f296fce26318c5692884854ba82a46a4a0f290a
font_01_sfnt_off0001279c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279C 12516 bytes
SHA-256: 4e24f1612a19c4b6ceb15c6348655bce2d042b9d70e95e96b78af7637af0ac24
font_02_sfnt_off000150c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34