Malicious PDF — malware analysis report

Static analysis result for SHA-256 7235ad80ad132e87…

MALICIOUS

PDF

73.3 KB Created: 2021-02-22 21:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4fd2090e3ef2df30ce91c2d71718c2c0 SHA-1: 13a86673f24309a8e2ea7ed148a40b7d69455887 SHA-256: 7235ad80ad132e870f7028a512403ff0e694afd24e1da288e86df8ef4c47f6fd
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One URL, https://crophysi.ru/strik?utm_term=how+to+check+continuity+with+craftsman+multimeter, is identified as a malicious redirector. The ML classifier and ClamAV detection further support the malicious nature of this document, likely intended for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9557

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+check+continuity+with+craftsman+multimeter In PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/1170156.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/aFlieCX/tapizuguw.pdfIn PDF document text
    • https://muxuredoli.weebly.com/uploads/1/3/1/3/131380086/zajojuf_jitutiboj.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/LfgjbWO/40919861966.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/emFhf3O/jamebawovomofiwosupe.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/geyI1M1/2nd_grade_common_core_math_word_problems.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/benadexu_rinitisopu_darojukojojasu_vegaruranoxul.pdfIn PDF document text
    • http://toxaxugepevu.iblogger.org/30193539304.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/7396ab307ed2.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/egihbia/zinebutevavadidejijup.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/reported_speech_backshift_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/puxamatewuleros.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/extent_reports_with_specflow_c.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/english_words_in_sentences.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/student_anecdotal_records_template.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/barcelona_team_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/maths_worksheets_for_kindergarten_printable.pdfIn PDF document text

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