Malicious PDF — malware analysis report

Static analysis result for SHA-256 a183e84bfb9b969a…

MALICIOUS

PDF

74.7 KB Created: 2021-01-18 16:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a70e996cd8251fe1013edddd8ff14f0c SHA-1: 5a4d5e10fb165f14978be4a37d5bc4bcd38860c0 SHA-256: a183e84bfb9b969a0162a48858a59d7c616c089abff023abf15e0afe9eacaa72
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains references to 'Google play app store', suggesting a lure to trick users into visiting the malicious URL.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=google+play+app+store PDF link annotation
    • https://cdn.sqhk.co/sifilefu/dYgfn12/netflix_account_cancel_subscription.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Qhcic1Z/inside_out_chords_and_lyrics_eve_6.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/ia1iegi/fipipejikifa.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/jjhi4T1/31445875589.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/ZhigjiZ/49477270798.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/bhhhfRe/angelus_paint_designs.pdfIn PDF document text
    • https://site-1203683.mozfiles.com/files/1203683/72760899767.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/ihjfhfC/easy_delicious_recipes_for_diabetics.pdfIn PDF document text
    • https://cdn.sqhk.co/ziloteduxemo/DghVfic/automatic_sms_forwarding_to_email.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/gc2ic2R/real_boxing_2_creed.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/dotivaf/12th_class_half_yearly_exam_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/public_health_nutrition_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/32741235415.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/24074075723.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/jijan.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/bare_tail_windows.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_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 5120 bytes
SHA-256: 65cec48cbbebb8438d72ad6a5c21f704eea871c35d6b4e25a901326df471fe25
font_01_sfnt_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 9940 bytes
SHA-256: d3104879014b1d705e2a3b9949804a67f97fa93ba519cef9626e17605a607f24

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