Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a80f00989d76fae…

MALICIOUS

PDF

73.0 KB Created: 2021-04-04 06:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2702761ccc1f32762fa745bd946020b5 SHA-1: c3e1f33dd889c545b511082799e876426f0d9cff SHA-256: 7a80f00989d76faedf98eb92ef8972930b3ea41364ec3197cbbe7e91c320f949
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=how+to+program+element+remote+to+vizio+tv'. This URL is presented within the document body, suggesting a phishing or scam attempt to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+program+element+remote+to+vizio+tv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_604ded7ca7ac1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476126/normal_5fcc736971f26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fcdfd683810f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokogemuzaraw.epizy.com/53180551689.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/86753991930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0176c8d4-2800-453a-a421-3eb0ddfaf25f/borg_warner_velvet_drive_parts_diagram.pdfIn PDF document text
    • http://kipixuge.epizy.com/blackpink_boombayah_dance_practice_free.pdfIn PDF document text
    • http://pifajipap.rf.gd/75239066226.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/52054500263.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/philippine_standards_on_auditing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/number_patterns_worksheets_free.pdfIn PDF document text
    • http://zidufixeda.epizy.com/qu_puede_causar_dolor_en_la_ingle_mujer.pdfIn PDF document text
    • http://nekobegediru.epizy.com/37237466363.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/sedefuwipadavofoka.pdfIn PDF document text
    • http://luviwozota.rf.gd/is_there_a_final_fantasy_16.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/toefl_test_structure_and_written_expression.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/5230841483.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/como_acoplar_varios_en_uno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ebf29-d458-45b9-b252-d935d1435d17/how_do_i_set_the_analog_time_on_my_g_shock_ga_110.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_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 5124 bytes
SHA-256: c07b1a8c2754eb32e365da0187b1355f91ea724aa41db08c9d419ab54c2e91ff
font_01_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 10576 bytes
SHA-256: 805a80566c737d4c8823698c8ac87cf6b81ac59fa105d88eb44d2ffe9547c89a

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