Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90927a7582855b1…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 06:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d554f997aed826705fd72b5be09f726b SHA-1: aa1f1621b72bff2efe16ea3ff39a19b967cc6da1 SHA-256: f90927a7582855b19f3b52a2ba82e12f4beb8f616d3aa7b73e7a3a097583671d
154 Risk Score

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=lorex+eco+stratus+app+not+in+play+store'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. 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=lorex+eco+stratus+app+not+in+play+store In PDF document text
    • http://serodot.iblogger.org/12648335834.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/lg9PLgf/dragon_ball_z_stick_fight_apk.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/dumupa/tobejasosupe.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/gartner_report_2018_pam.pdfIn PDF document text
    • http://lubozudaxik.epizy.com/76667070221.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/87532995971.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/finding_the_sum_of_interior_angles_worksheet.pdfIn PDF document text
    • http://godimodasixor.rf.gd/43499051559.pdfIn PDF document text
    • http://kukalofawofami.epizy.com/iphone_ios_version.pdfIn PDF document text
    • http://musovinudebepak.epizy.com/crazytalk_animator_3_pro_free.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/2018_toyota_camry_xse_interior_colors.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/litany_of_humility_prayer_catholic.pdfIn PDF document text
    • http://loxototo.epizy.com/edersheim_bible_history.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/minimalism_movie_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/17469177409.pdfIn PDF document text
    • http://tofezaniv.rf.gd/avision_ad125.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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 5040 bytes
SHA-256: 6c03dd26b81664c1022b401de7480c5a8851bb1b930ba37cb41adf633eb8e4f9
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 10256 bytes
SHA-256: 7dd3c34491164ad8f274fe913349d1d9ad512c431cb209c7af81ac362ae41189

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