Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a171fbfe4e48ca…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 10:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e77bcb89dcbfd242a567eecd0c032fbb SHA-1: 302427d65526cbed9cf29e658af46d4fbb604741 SHA-256: 87a171fbfe4e48ca9ee75aa9698503bfe160d066e8df8e7783da782c348af6b9
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/strik'. This indicates the document is designed to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing attempt.

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://crophysi.ru/strik?utm_term=does+costco+sell+blood+pressure+monitors In PDF document text
    • http://mangalvpodarok.ru/72239282191kb6av.pdfIn PDF document text
    • https://cdn.sqhk.co/noxawuge/dhaahaq/mipabasororoke.pdfIn PDF document text
    • https://cdn.sqhk.co/dubeminap/e3Ligih/tarupeteturuwas.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/bleacher_report_nfl_draft_round_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410013/normal_5ffbaca7476ec.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/jcXwhfW/citytopia_apk_hile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_5ffadb84bd64d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5fe801f0512bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5ffdff8a15b29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5ffff58aa97ef.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/vafifojerulebijaratilipxvh.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/voxulija/78019398235.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/8730760902.pdfIn PDF document text
    • http://risepaxazitomep.rf.gd/how_to_turn_100_000_into_a_million.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/palakisefufurumovev.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_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 5148 bytes
SHA-256: 0c46baac0d87232f2c8f54ee5ba319ce02f4c2f65725c418754580662e55071c
font_01_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 10788 bytes
SHA-256: 24a4cc519868b1c0e904cece7cbf9017a8f1261ab23170e81bc57dbd0f12fc3e

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