Malicious PDF — malware analysis report

Static analysis result for SHA-256 4360a93ad109d565…

MALICIOUS

PDF

78.6 KB Created: 2020-11-26 12:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e95da5edce8705cc7e800227fdd116ee SHA-1: 29e57a822c1ebf187eebee1688e16dccf77da586 SHA-256: 4360a93ad109d565fc8b0c7cb4f6ec103ae0190ef8028d58d07769bb8f3623d3
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://trafficel.ru/strik?utm_term=narrative+therapy+interventions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5faec506d7a0b.pdfIn PDF document text
    • https://somolepudurupe.weebly.com/uploads/1/3/4/3/134332146/ef3f21c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_5fa26f36478da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5fa0016670b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_5fa2609ae3276.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/pajukovuxetu/vomuteporibuwevupimiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/improving_self_esteem_and_confidence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461e9541-d6c9-428f-8f37-2f1522e7cd5f/rolling_in_the_deep_piano_sheet_music_musescore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1688a5-6f29-406c-87af-9240df21b7e2/gajefuno.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/vmeals_charlottesville_va.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/56362533578.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/libro_de_canciones_con_acordes_para_guitarra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f026f63f-bdd2-4b15-8522-062bad7fe25b/tekken_blood_vengeance_sub_indo_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/go_math_grade_7_answer_key_module_3.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_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 5004 bytes
SHA-256: 7f52c1eee3195dbbbce1e1f3c65288bee56fc03e576a558cc1bbaaf6e9e7be24
font_01_sfnt_off00010a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A83 10320 bytes
SHA-256: 7812de3898641c26a33d2ec00542ed0917f10b8d9fead2752c894c2a229d321a

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