Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca175936bb665ba…

MALICIOUS

PDF

75.8 KB Created: 2021-02-23 05:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 436479b0fb02c22bc0bd1cea60544485 SHA-1: 93449993cb1aa8a4fcb819c01614a0119fdd26a6 SHA-256: fca175936bb665ba87507c1fbe4cbbdf94db8047cd8c509a22dfb3085eb849e9
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://crophysi.ru/aws?utm_term=grade+2+spelling+words+alberta+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=grade+2+spelling+words+alberta+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_601307114f490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368471/normal_5fff47f97fbc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fcb8d78a1a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_600737a7cb6f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_5fd36936afa7e.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/libowebujakux/global_geographic_information_system_gis_market.pdfIn PDF document text
    • http://matowozor.epizy.com/2224537579.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/double_digit_multiplication_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/autocad_2d_3d_software.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/90681746059.pdfIn PDF document text
    • http://babematalal.epizy.com/73186248764.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/pathfinder_kingmaker_review_xbox_one.pdfIn PDF document text
    • http://vanudedu.epizy.com/59985567219.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/all_your_duty_song.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/fujopojufaruveg.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/simplicity_sewing_book.pdfIn PDF document text
    • http://banitazivi.epizy.com/best_12_foot_trampoline_with_enclosure.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/48537198434.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/47040583277.pdfIn PDF document text
    • http://mokodipixa.epizy.com/99835836546.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/how_much_wealth_does_the_top_1_percent_have_uk.pdfIn PDF document text
    • http://xeravujowa.epizy.com/navirunofexesozosazepiriz.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_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 5604 bytes
SHA-256: 62536eb98028556d4e3f6697d382298c1fa933fa94b22a2004c452e8abc219b4
font_01_sfnt_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 10356 bytes
SHA-256: 38b3499201ae9494dccdd69d7a7eecc7d1db633bfbdaac7612b0c678b654a3ee

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