Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39307318530776b…

MALICIOUS

PDF

200.4 KB Created: 2021-02-26 20:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6d387e6ff405a4c8b189dd690777857 SHA-1: f6f845ea90c94fb5b2289c81abb9ffc087a25ff9 SHA-256: e39307318530776b6407d0ac660186755e3fa80e3eaa5dd1263d7aba889d37c5
174 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical alert for a redirector link to a known malicious domain. The document body, though heavily obfuscated, contains elements that suggest a lure, and the SE_CALLBACK_LURE heuristic explicitly identifies a phone number prompt in a context of billing, refund, or security issues. The embedded URL points to a redirector that likely leads to a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=panasonic+phone+manual+kx-tgf570 In PDF document text
    • http://sakulog.sportsontheweb.net/the_lady_with_the_dog_theme.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/bjbVib9/12199140659.pdfIn PDF document text
    • http://evatopshop.xyz/17045514034r05cf.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/how_to_reset_honda_civic_2007_service_light.pdfIn PDF document text
    • http://anyita.space/gawivakerakurimejav7knma.pdfIn PDF document text
    • http://good-production17.site/coolest_fly_sheet_horses4mc9x.pdfIn PDF document text
    • http://organicnu.info/7th_grade_math_book1ccvc.pdfIn PDF document text
    • http://tuxodoj.22web.org/best_data_analytics_software_tools.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/america_the_story_of_us_episode_1_worksheet_answers.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/72_king_kutter_finish_mower_parts.pdfIn PDF document text
    • http://polikarmonolit.ru/pikosexurdz93n.pdfIn PDF document text
    • http://hushseo.online/xarolefanilexovemujalelu3cgdn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surotatifezuxe.rf.gd/55529126348.pdfIn PDF document text
    • http://fetapewifug.epizy.com/59678582630.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/all_in_one_bootloader_unlock_tool.pdfIn PDF document text
    • http://kajonamopesubom.rf.gd/sibavozizibowa.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_off0002d546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D546 5844 bytes
SHA-256: fe8e5cc35e6ddc1b07642f39c6c19c4e19b4a21eba4d53ea1b5f81a5beeccfb1
font_01_sfnt_off0002e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E927 12976 bytes
SHA-256: d5950a7ed1645eadeee89256fc7d69f7d6faaab37024d5bf5f849bb8e4c14dab

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