Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619a3bcf5ae7911…

MALICIOUS

PDF

73.9 KB Created: 2021-05-01 21:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59f3d351f818c53ebf8544dc811ec5f0 SHA-1: 13571df8c13500b032b0eec76bc51784617c8269 SHA-256: 6619a3bcf5ae791136559057e99930d27d58ac9632de9bd136b6d9721093cbc8
156 Risk Score

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://druttle.ru/strik?utm_term=development+through+the+lifespan+pdf+free PDF link annotation
    • https://tedevonefuses.weebly.com/uploads/1/3/4/5/134528644/dd3d94839af87b5.pdfIn PDF document text
    • https://zuwuloju.weebly.com/uploads/1/3/2/6/132681456/tupozafun.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/master_cleanse_daily_recipe.pdfIn PDF document text
    • https://zojipulororasa.weebly.com/uploads/1/3/6/0/136011419/3563b75d1.pdfIn PDF document text
    • http://vagiburenumow.iblogger.org/syntax_score.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fixorafusadaxuk.rf.gd/aol_instant_messenger_old_version.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_f474e93ba06d47d7aea56ca9e3bf251e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/97409360346.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_eba7c462e2194a50b1703c9a924451a3.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/probability_math_for_gre.pdfIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_2e87a2b3222a46e4a8c5cd9309854f2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/mevix.pdfIn PDF document text
    • http://solugivewatewa.myartsonline.com/55990441862.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_a6af38a1494447caa88b44c7d1edd29e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/duwuwuvikajuso.pdfIn PDF document text
    • http://fetijuvutod.epizy.com/total_gym_11000_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/90678523776.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_85813a07a7d848669b4f90fe1455d299.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/top_10_games_for_android_2019.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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 5512 bytes
SHA-256: b0f320cbc826fb1dbc8913d223663878b5dbc639e2b8ef77eda9b75f3a6bec90
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10732 bytes
SHA-256: dfc4ac6a6f7bbaa2a339c61bd96fcde5111f02e777335f39ae86a9151f22c2b2

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