Malicious PDF — malware analysis report

Static analysis result for SHA-256 542ae8a38e9a490b…

MALICIOUS

PDF

73.4 KB Created: 2021-02-21 16:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16f2b1cdebeecbcf56e21a0740386ee0 SHA-1: 61588aad7983e82dcb69b7401df55f16dc06a84a SHA-256: 542ae8a38e9a490b63ddf00f1c163308b451a71eb04a582747192d018473b323
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 0.9997

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://crophysi.ru/strik?utm_term=buffalo+enco+rice+cooker+manual PDF link annotation
    • https://cdn.sqhk.co/datisafapuv/gdsjdmq/most_difficult_games_to_run_on_pc.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/a9bf1935bd636a.pdfIn PDF document text
    • https://ximipozatapemo.weebly.com/uploads/1/3/5/2/135297631/5b378e05f05c.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/zasijifipak_rijed.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/wjhiMww/wufefanebibanuxikulezop.pdfIn PDF document text
    • http://keligekixebar.22web.org/best_movies_site_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/dghd6gg/vefovubadezumekirafefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_600b4091392b2.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/VZGij0e/rail_rush_wiki.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/gedimuta/fojupevaveramamizilo.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/nokabuwanisepil.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/sivovulenenobizu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/xajerotijanumula.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/62280005827.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/vonatuvupig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 4960 bytes
SHA-256: a681774e3652752305ea249b71c2feafafd3099b7799ecfed4c03b28aab48934
font_01_sfnt_off0000f3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F0 10768 bytes
SHA-256: 3751bf10adbc6d4cbf4397fd687e7c376a8471271ab7ca652058acdcc4fada32

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