Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca67d92d4455b154…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 06:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 43f1443ce188047e90a2abdf17f6446d SHA-1: 464f5bf87adf2e3b47a9b8ce47c8e8b2fab30378 SHA-256: ca67d92d4455b1547fa5ac93341d2da00dc7ce7d48995cfa16f29aa775847604
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://yafferge.ru/123?utm_term=how+to+play+chickenfoot+with+double+6'. This URL is likely used to redirect the user to a phishing page or download a malicious payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=how+to+play+chickenfoot+with+double+6 In PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/32d23704efa2.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/polufisifimumodimitu.pdfIn PDF document text
    • http://study-english-02.space/tutesovejomorawidinakedml8af.pdfIn PDF document text
    • http://creditscorecard.info/solving_multi_step_equations_with_fractions_and_variables_on_both_sides_worksheeta5qfx.pdfIn PDF document text
    • https://cdn.sqhk.co/xamubana/hFgzjbY/gejod.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/daniza-gojaloto-nijur-zekazadevosos.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/95a8c3a29.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/CMlgejh/17920379693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6022fbce61013.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/jVjjDhb/carson_wentz_contract_2019.pdfIn PDF document text
    • https://gufogejerujog.weebly.com/uploads/1/3/1/4/131406717/eba37722edf815.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/xedewofuretujo/secure_boot_enabled_android.pdfIn PDF document text
    • http://suvumudupese.epizy.com/gikimajitozofekexipafivi.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/diagnostico_organizacional_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/kokawuwarebij.pdfIn PDF document text
    • http://zepedijuva.epizy.com/44582353166.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/porsche_cayenne_gts_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/c_d_jain_college_shrirampur_feedback_form.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_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 5484 bytes
SHA-256: 4eff7a862849df2a339d4125373c9e4284c1dc71d837f526a72e539b39bf46f5
font_01_sfnt_off0000f4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C3 10016 bytes
SHA-256: 46db221b9bd831903600dc85c909e3ee31b1e949e8e2aa78bf6ad85c670099c3

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