Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44b48b17a948a56…

MALICIOUS

PDF

73.3 KB Created: 2021-03-01 04:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f58925c1e40cef57d74e0d7a572a343 SHA-1: 32d9bd440913ddae66675e06cbae9b340ea20ba5 SHA-256: d44b48b17a948a561ed23fb777e7f21e0fd3137a908dd39168b1485b9c14f9f2
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by multiple engines, including ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed as a lure.

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://baarspo.ru/strik?utm_term=an+organism%2527s+particular+role+in+an+ecosystem PDF link annotation
    • http://good-production9.site/vuforu6ofwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481271/normal_5fe234637836e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_6036905e94e99.pdfIn PDF document text
    • http://anarchymedya.com/b._ed_course_ka_full_formhxc5u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5fe5d4559154c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fd2f32398a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60119f2a3c6d5.pdfIn PDF document text
    • http://shop50off.info/inventory_database_template_access_20137jvx8.pdfIn PDF document text
    • http://merovew.xyz/wazazusozevuwur3wknp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5ff086430d67b.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/GhcLSwa/chocolate_cake_recipe_without_eggs_and_dairy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_5fe9a80a6e724.pdfIn PDF document text
    • http://gbarb.me/acuto_formal_shoesbla4p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_5ffec1226c12e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/english_citizenship_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/jakoka.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/94854655301.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/just_leave_me_alone_images.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_off0000e140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 5380 bytes
SHA-256: b06ff18f1928088537000107d04e9c30cb01cb9d142ba07424c797929446f317
font_01_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 10940 bytes
SHA-256: 4d68ded37500686e1e901238cdffe1bb56e2dd6a4f92d5564d62284af1c04bd7

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