Malicious PDF — malware analysis report

Static analysis result for SHA-256 d364abf3cfd21f6a…

MALICIOUS

PDF

70.8 KB Created: 2020-12-15 08:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a34f368be370515a022e154f60c14636 SHA-1: c8499fa1dcf170718c763fa37e7da1530c2e82af SHA-256: d364abf3cfd21f6a7bf3238a709a9ea53b16205a7a29483451d8e12b79651a4f
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, aiming to trick users into calling a fraudulent number. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards malicious intent, likely involving social engineering to extract sensitive information or financial gain.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffine.ru/123?utm_term=evenflo+symphony+car+seat+recall PDF link annotation
    • 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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf631edabee7b4406ce8b/1606219313448/73143231364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841eb236-03cc-4071-81e3-fa15c6e31df6/nazafivibatupagebili.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/bonawifupuzomupijalulap.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/lobuto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2db170a2757459befb396/t/5fced7448b174454e98e5b2c/1607391045599/linkedin_careers_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/faluzevijej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a8cd92-9a70-4553-b8cb-33ee8bfdec07/quotations_happy_new_year.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/55533532865.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/jogip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe087abc819f1cf49fa04a/1606289531372/acolyte_leveling_guide_ragnarok_eternal_love.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/2141416682.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/camera_shots_and_angles_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ffb2ebc-2c81-4d9a-92d3-ffd542c89573/average_speed_of_a_plane_in_meters_per_second.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_off0000cbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 5116 bytes
SHA-256: abb2064f7a6267f1e608c303ce73f11fa8f59f316b9196eaa884b0219cb8c878
font_01_sfnt_off0000dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 10224 bytes
SHA-256: a9d05e126a03d4c39d2776b8a06432f45327c9bb1a502a0ce91b670a25b6fddf
font_02_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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