Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6b92f616728b93…

MALICIOUS

PDF

63.9 KB Created: 2021-02-17 14:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cece2aeac4e68dafe7327acf3b868b79 SHA-1: a649c7a770ecff5f5ab719bfb27cc18dd80e1def SHA-256: 3c6b92f616728b933a3b233450a165dfb4ebb73dc325a670ffece81fc41107bc
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of links to external websites, many of which are flagged as malicious redirectors or part of link farms. The document body, though heavily obfuscated, appears to contain text related to a movie search query, suggesting a lure to trick users into visiting these malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=romeo+and+juliet+1968+full+movie+google+drive In PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/norofek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fe756eaefa76.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/didhb8I/vakazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_60127073b9fce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ff1e829a363e.pdfIn PDF document text
    • https://zogugixuwomu.weebly.com/uploads/1/3/4/2/134234599/cb0fbf.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/llahiDe/31468728674.pdfIn PDF document text
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/zegul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446280/normal_6004d243165a5.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/gurowozenupifi/marpol_annex_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/baking_pans_for_sheet_cakes.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/domestic_worker_attendance_register_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/blue_bells_of_scotland_trombone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/dibalime.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/resumo_atomistica.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_off0000bc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC77 5748 bytes
SHA-256: 0047b4b525f7d00e924ba058793100b0c46b6b29077e21d4dd7d4a6a402954bc
font_01_sfnt_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 10156 bytes
SHA-256: cf3e5637d71030d018c8c53fd29584f664253877ee7e89a7ca503ea1b05538d3

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