Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c4b5ba40fe971d…

MALICIOUS

PDF

68.2 KB Created: 2020-11-27 12:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8d463c941b3b98a292e34c6023704782 SHA-1: bcf609579550563240da684efe75e49f56d8f9f9 SHA-256: 00c4b5ba40fe971d9ee55f9e0be9ececabac157d4e272a1055b06c2adcf7081d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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
  • 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.
  • 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://trafftec.ru/strik?utm_term=minecraft+pictures+of+houses PDF link annotation
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/d90a0aa231e0c0.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/wasuwifonu.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/wubevawuvogajopif.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/c9b70fe0c.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/sodoxi/pitarilulesanerevapufi.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/82840747497.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/the_death_penalty_argumentative_essay_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/zte_n800_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6701bf-278e-48f0-a17e-36e120303fbc/saroguxuwobikimodibixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3590a0ab-712e-4eb1-b4bd-3f471862567c/leadership_james_m._burns_epub_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/woxinakofurexufevom.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/verbal_analogy_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/riwaxepuxivanojoxupef.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/mirro_matic_pressure_cooker_instructions.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_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 5076 bytes
SHA-256: 60484bb93275856da2266779f15775f49de3cb1a45a09344c4971f3a1fbafbde
font_01_sfnt_off0000dfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBA 10572 bytes
SHA-256: 9979f62a3a7fcd88feb77a0d9ca5724be6748c3a482ba01ec8c1577b3db5bb38

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