Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1b1281674acf7f…

MALICIOUS

PDF

81.2 KB Created: 2021-02-28 06:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6cd091cc4629bd4acb4207c5e039b5d8 SHA-1: b69b4479a66038463a1a8586adfbf3c0bcb4be80 SHA-256: ac1b1281674acf7f669ed41d8defc56a00cda90dc10968d06a31de67b3654af1
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=how+to+change+my+logitech+mouse+settings PDF link annotation
    • https://cdn.sqhk.co/dasofuduveje/7hj3ii2/adventure_story_2_hile_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_60230196c9793.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/giaZgen/zufagivokunodewaluvar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459794/normal_6020bfcc42116.pdfIn PDF document text
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/wigibofuvow.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/sebifexuwuladi.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/10abe84557.pdfIn PDF document text
    • https://nekewagan.weebly.com/uploads/1/3/4/8/134881830/2744833.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/7906f0.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/do77bjc/2018_shelby_super_snake_for_sale_canada.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/80454479390.pdfIn PDF document text
    • https://tolorojefa.weebly.com/uploads/1/3/2/6/132681575/8105573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_602629c3eed6a.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/9a17079.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/wiwamoxamo/fidoru.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/mcgraw_hill_kindergarten_reading_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/bmw_bike_photo_hd.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 5272 bytes
SHA-256: a99ab92e544a81d4c17288129bb62ce752b463cb272fc9151e20be3c07762eaf
font_01_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000110b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B9 10612 bytes
SHA-256: 24bdbbdfa67a62d87790e1f5b6be32ead0e36967bcd496ba07dc47146f730eb1

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