Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01f35bb3bb0683a…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 00:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a145be10832ed759aa1e7a7fb306e7ce SHA-1: 580b4322c004d75310d8f9c8d00562308a7ce12d SHA-256: c01f35bb3bb0683af0ac20609992819dfab8921c22eef25b5e09592a53832723
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://yafferge.ru/aws?utm_term=2019+challenger+srt+performance+spoiler'. 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 0.9997

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/aws?utm_term=2019+challenger+srt+performance+spoiler In PDF document text
    • https://cdn.sqhk.co/zirimikuj/VlejjCQ/five_nights_at_freddy_s_ar_special_delivery.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/wixanarer/essential_oils_doterra_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/coliformes_termotolerantes_em_agua.pdfIn PDF document text
    • http://pasumogebono.rf.gd/20391575715.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/safety_data_sheet_for_spartan_glass_cleaner.pdfIn PDF document text
    • http://rakutekapo.epizy.com/video_recording_software_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/mozaxakigikuvikukira.pdfIn PDF document text
    • http://kotopofixivu.rf.gd/dijebesofagezukiziratosad.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/81482113030.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/13568866062.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/domestos_bleach_safety_data_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/mefifuwira.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 5816 bytes
SHA-256: 3a5779fe3699da2d16f2c18b93407befb8501fe5eabb1f993d23275482f373a2
font_01_sfnt_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 10916 bytes
SHA-256: 99da7d4eb389808a44041ab5b31bb8ce5cbdedc5a9a6352b448e5e005a8254ea

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