Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93ecbe7fd72ecb7…

MALICIOUS

PDF

75.8 KB Created: 2021-02-23 06:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea2e5561139ef6285ee6a715e7eb086f SHA-1: 109155ed8683fdb4462443cbecdd3e06b27b847a SHA-256: a93ecbe7fd72ecb7c5a58e9f8d780544a16f4ceb3e9458b3c2192eeea7579ac0
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=suzuki+book+1+violin+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376874/normal_5ffb677a48cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_602b5b2d1cfd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494668/normal_6017ff8a0d1c9.pdfIn PDF document text
    • https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/lonano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_601995c2d4b9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5fe10e0db483d.pdfIn PDF document text
    • https://larunigilusevim.weebly.com/uploads/1/3/5/3/135320243/a73c670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_6021510ff0582.pdfIn PDF document text
    • https://julasunanuk.weebly.com/uploads/1/3/4/3/134308365/mulirixadaso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499673/normal_5ffb82d147b76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5feaf00139409.pdfIn PDF document text
    • http://hookup753.fun/22609232187yi36d.pdfIn PDF document text
    • https://furadigiwib.weebly.com/uploads/1/3/1/4/131407367/nisakesewu.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/vuxalirudidel/calculator_java_source_code.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/certificato_di_conformit_impianto_elettrico_fac_simile.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/80545487824.pdfIn PDF document text
    • http://venavabumekaj.epizy.com/nizagedizaguwudarezonudet.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/what_does_basc_measure.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_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 5020 bytes
SHA-256: ee0f3a7f0c3e0de58d2e4a2afe32189aa336acd7c33f58b6dc90a861be2988b1
font_01_sfnt_off0000fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 11116 bytes
SHA-256: b15b614bb4cb0aa99af89608ffd657720c38f0e4e5df6969473aeef986ff1d35

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