Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bae3a8ec3d5a475…

MALICIOUS

PDF

95.8 KB Created: 2021-04-04 21:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c4338bc24705f29db1cb264f3b072215 SHA-1: 8f7f6325df602b13c6f89799a61d0fb87cf239ec SHA-256: 7bae3a8ec3d5a475f3442da2a6951da01a7b8fc91c93930150e3d86c4416e9eb
186 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 6

  • 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 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://baarspo.ru/strik?utm_term=john+kotter+leading+change+1996+pdf PDF link annotation
    • https://cdn.sqhk.co/jedugifaxido/icfiehj/gimogurater.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/77603074530.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzekofuwe/JnvOFie/ages_of_empire_android.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/4053204.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/fzlVCJZ/penobuwebitukezitud.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/f6cdf9feeae.pdfIn PDF document text
    • https://loligotobufineg.weebly.com/uploads/1/3/0/7/130739446/e2be1c7.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/41443.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/2242014.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/musejipox.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/kugatesaruwezu.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/guitar_gospel_songs_with_chords_and_lyrics.pdfIn PDF document text
    • https://fuborevotoxuto.weebly.com/uploads/1/3/4/0/134017795/dixolomileze-tovemudan-fedokanu.pdfIn PDF document text
    • https://jawoxaze.weebly.com/uploads/1/3/0/9/130968973/8037373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_7619449764e24a94928de88e7da122c4.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_f483c0ba9da84b3eb599c2000262d990.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/pandaria_flight_trainer_location.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/2nd_degree_black_belt_in_brazilian_jiu-jitsu.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_dd6b4d95628d438a8d8550ea31732b94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/marvel_jarvis_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/exponent_rules_maze_worksheet_answers.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_off00013884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13884 5652 bytes
SHA-256: d982c88b62fdef043fe26b6a9889142c93c87f80f05c0e0d72a7f06682eb375b
font_01_sfnt_off00014bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB9 11288 bytes
SHA-256: 4b42d1890d56e1eb0efa253693878430e9a512176903b047fc02deca88b9d93a

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