Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a62ef1f59f4d24…

MALICIOUS

PDF

86.2 KB Created: 2020-11-24 16:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cf97367a348f2e83f8985a4604564759 SHA-1: 9bedb6ed5d431256a5d8a61c1cb65e0c5961c72c SHA-256: 65a62ef1f59f4d2477823fd1d72e0eeded46610dbf379407d173a8808a7a14af
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 0.9995

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://trafffe.ru/123?utm_term=hand+to+hand+combat+techniques+pdf PDF link annotation
    • https://vudizexifaret.weebly.com/uploads/1/3/4/3/134314381/58ef691371.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/punitetiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8d37dc91811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/xibimivolago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d179cbef-2750-43d7-bcd6-024e7923eeaa/pisoweteko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b54325-eb1f-4461-9268-d0be2dce50a5/simbologia_basica_de_uniones_soldada.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dedulifukuvutukozojo.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/diagnostico_de_anemia_ferropenica.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/fatogibin.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/erlang_gen_server_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3815eaa4-15a8-4d4d-97a4-c01fb3f340ff/el_ao_que_no_llego_ana_maria_matute.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 5376 bytes
SHA-256: 9e36505d18c636a6f73c28140ad334d1fc17d083cf2a6ef8d7361e4b2d591bf0
font_01_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 10712 bytes
SHA-256: 7849ed71d1962de52f74b1574dc2cf974ccef9d1735d557a38239635479c8b2b
font_02_sfnt_off00011295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 25072 bytes
SHA-256: 2033acb8378f0a451d066593d6be722b92001dbd79b7d4a11c514726b2f2c677
font_03_sfnt_off00013d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D82 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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