Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e54753b7ad0be8…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 23:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ccb454284a0c3aac8353d5c6df105ba SHA-1: 025268a314017934d18aa64d62a7fd7fa7143ae3 SHA-256: 83e54753b7ad0be8dc67169fd75945f15b5a6dd3ea4d4e85ae0e858920acf608
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=how+to+become+a+certified+driver%2527s+ed+instructor'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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+become+a+certified+driver%2527s+ed+instructor In PDF document text
    • http://tuduvodakep.mypressonline.com/53282833028.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/fmmjghe/btd5_unblocked_weebly.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/jdghXNc/94430560373.pdfIn PDF document text
    • http://getallcreditscores.info/50777168378jxean.pdfIn PDF document text
    • http://dkblogin-de.com/94123289529xefmm.pdfIn PDF document text
    • http://hustlinmoney.com/dictados_musicales_1_profesionalc53uz.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/gW0hhih/formula_2_2020_silly_season.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kolenexe.epizy.com/pewalipojan.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/66130639349.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/fuzeger.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/romeo_and_juliet_act_3_scene_1_modern_text.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/main_hoon_bodyguard_south_movie.pdfIn PDF document text
    • http://luzawuwu.epizy.com/reference_list_apa_6th_edition_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/61235626710.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/court_reporter_school_near_me.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5420 bytes
SHA-256: 158f640f98da0e447e834e2eb8b60290c148cb70a396adc15b1dd4c2a79a5f24
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 10716 bytes
SHA-256: be559129081cbd598b1490addf769dd36796ed6324d822c631ce3fdb65dd08e5

Open this report in the interactive analyzer, or submit your own file for analysis.