Malicious PDF — malware analysis report

Static analysis result for SHA-256 c603c3d709565e20…

MALICIOUS

PDF

79.3 KB Created: 2021-03-12 16:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 987483277c86faa0013adaa2d91e7516 SHA-1: e9ac532faabdc87243e7661e7145cf08652d124b SHA-256: c603c3d709565e201850c9b2a39e48f2f33aaea66907f2ebd21c6d8f8334c0a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://zajinet.ru/wix?keyword=brief+definition+of+tour+guide PDF link annotation
    • http://gugibugud.mygamesonline.org/79946897671.pdfIn PDF document text
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/a6e702335.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/ieKffie/imdb_movies_2019_top_rated.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/hd5Xjb7/jesufon.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/calendar_september_october_2020.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/31876353732.pdfIn PDF document text
    • https://zalomumizulewad.weebly.com/uploads/1/3/4/7/134721246/sesafuwufo-nozurakipe-kisileru-deruje.pdfIn PDF document text
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/1169099.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/9fe0e02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kilarosine.atwebpages.com/navy_chief_eval_closing_statements.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/surya_atharvashirsha_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05807e99-b9ee-4fc8-8c25-ad496ef909fb/11217138232.pdfIn PDF document text
    • http://lowavizoviwu.epizy.com/hospital_alta_complejidad_formosa.pdfIn PDF document text
    • http://lovikusikew.epizy.com/69610006743.pdfIn PDF document text
    • http://zepibugab.rf.gd/zolulobavupamog.pdfIn PDF document text
    • http://valajawegob.epizy.com/how_to_fix_a_dvd_player_that_wont_open_or_close.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501e37ea-5907-4bb2-b3a2-cc9a5f72599a/52992959507.pdfIn PDF document text
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_519c15779339420b905c361765e42ad3.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_fc04ee6cfbde44e3ad9eed96785e59f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a918cf1e-5e4f-4484-937f-97eb15bcea61/kodoralavo.pdfIn PDF document text
    • http://rurudowofalav.rf.gd/airman_s_information_manual_2020.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_e2e5cd49c23545e5b77f0408bbbd5876.pdf?index=trueIn 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_off0000f9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 4704 bytes
SHA-256: f857aa978dd32c6e71512ff356a9cfb3934aeeab031a233a0ede6f87d974ece0
font_01_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 11036 bytes
SHA-256: bbf6ecc12b1f428d7d21bcaaff8e0bb1487075656bde15d02235002c7b559764

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