Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea79da3631088ead…

MALICIOUS

PDF

73.6 KB Created: 2020-12-24 21:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bd6cb48a1fd61306f4e83632a08c7c08 SHA-1: fbde519f198bf59c9961662a18ffc135067c90b8 SHA-256: ea79da3631088ead5c3284a53f457b391501c083d9c6652b600869f71c220226
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/aws?utm_term=gastritis+aguda+definicion+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5fbbd80b2930e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fd048f60a7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f9e743486250.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/dabepe_vibiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_5fb5a85b1c194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f92010847091.pdfIn PDF document text
    • https://merigufut.weebly.com/uploads/1/3/4/3/134357701/ketew_misujakad_ruzem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fd2adfb19b69.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/desekusoxi/57922113630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9be844-1144-4127-9837-6c21dcb52f2b/rubberband_man_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/36958100714.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/risovonanenedurelapezagob.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/simmons_da50_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb67a84-5fc0-4f23-950d-26da0a9c9fb5/16835401983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743af963-936e-470f-91d5-6cee2d50e6fd/psychology_chapter_4_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/65044187600.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 5324 bytes
SHA-256: 84f63c78658d9c3864b7a5cf08e94059837bd9b035cbae706d51cb39ab937163
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 11332 bytes
SHA-256: 1bb3e4abeba8d852d17868d6513873ee0eb49275ee4d768ff798e3fb3e72fff0

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