Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4d393f804f2937…

MALICIOUS

PDF

98.1 KB Created: 2021-05-17 14:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d596beeeb7702a647b74b1ed255c8a7 SHA-1: 70037079ce9b56042167353cd0f141c27b9d4c40 SHA-256: cc4d393f804f29370594051c36394584a4ba5f2acee44f98ab97b6966eac4df4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/strik?utm_term=eragon+book+5+release+date+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fe9429d2a823.pdfIn PDF document text
    • http://zejufixapoferu.iblogger.org/72775525880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455673/normal_5fcda997c6419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_604d69cbb0156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_606c47b41a2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_60501242bb8ba.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/ragejufa/kilowinegewituj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a536bb2-4cf7-4917-8ae7-262cd482b4c6/togilokalejekunij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0b4cde-93ef-4463-b39b-8a6c61e50d02/zejakalesebezilawosopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c41aee-93e1-481f-b1c3-d0ff94c3d5f9/how_much_is_a_lifetime_student_membership.pdfIn PDF document text
    • http://wexiwifobezaxi.epizy.com/7615139296.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/is_saitama_the_strongest.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/86895252059.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/lupap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4054fd-76eb-4026-8c89-c1b0581dca77/some_words_to_describe_sunrise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef60eda2-9545-4a92-b7c1-e6051266bfe4/kekalasokodopa.pdfIn PDF document text
    • http://fejobizife.epizy.com/16837162616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980e37a6-4707-4ab1-bc5a-9ab07fc1aaca/ryobi_one_plus_range_review.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/vakegunodutatuviwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/ejercicios_de_limites_al_infinito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48df6a38-69df-404b-b875-99067eea587c/gevuxefawodezixefageve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f367edc-8057-4e24-aa57-00364fef1140/texas_principles_of_real_estate_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855501bd-6d18-407c-a5cd-cefcd8c94550/salit.pdfIn PDF document text
    • http://ramogefakox.rf.gd/9669536636.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_off00013c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C37 5796 bytes
SHA-256: f40f92f9b50047f0fd31c9bce87eac4a53b39644cb5aa7d195677ae5d2c50165
font_01_sfnt_off00015009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15009 12692 bytes
SHA-256: 4a94b5c6e3da7179d5adc9287750a1dc744d308d5a3946bf188839faa33ecdd7

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