Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dd717ebdfbf2cd…

MALICIOUS

PDF

82.8 KB Created: 2021-03-16 03:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ed06ca1263625dcc6eedef770fa584d2 SHA-1: e29c4a2ec1983a9db40c41072029b45150796a0c SHA-256: 70dd717ebdfbf2cd2f09e3acfe3d2b427944d936b1f5f2c241755853f973e95d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it hosts a large number of external links. One of these links, 'https://resalured.ru/strik?utm_term=smile+raina+telgemeier+series', is flagged as suspicious. The ClamAV detection and ML classifier also indicate maliciousness, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=smile+raina+telgemeier+series PDF link annotation
    • http://chisto-chisto52.ru/bozuvidq2lc4.pdfIn PDF document text
    • https://zejuvuvegodefi.weebly.com/uploads/1/3/1/4/131453892/zaganoleluwuwavezoso.pdfIn PDF document text
    • http://walletelectrum.buzz/wulufapikiz6u5l.pdfIn PDF document text
    • https://rategojo.weebly.com/uploads/1/3/0/7/130739688/4297936dcfddc2.pdfIn PDF document text
    • http://realwockyc.info/bujegowozaxirugglmpb.pdfIn PDF document text
    • http://badgesverified.com/antd_datepicker_formatb3bqc.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/pefuzanefivujer.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/lojife-lonekabasinof.pdfIn PDF document text
    • http://pokemonrivals.online/shoot_em_up_movie_star_cast4gca0.pdfIn PDF document text
    • https://wezisewego.weebly.com/uploads/1/3/5/3/135342704/5187184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/175ba0ef-1bdf-4d46-b6ac-7d0585e6d870/zara_and_hm_target_market.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/recorder_sheet_music_ode_to_joy.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/what_does_hypersecretion_of_adh_cause.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/autodock_vina_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa230b6-01ac-4ba6-a476-456b6160439b/what_brand_of_pressure_cooker_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/amazon_kindle_ebook_formatieren.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/the_casual_vacancy_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/xopukusijaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85460f1-9934-4abe-9d38-39be7c28ba01/32447548664.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_5c46bf7ea47b4aa2b805b0ffaf656017.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_17f4e5394e934c9bb10862f941ff7963.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/mubapudugidulapub.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/allsecure_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/canada_visa_work_permit_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6cce97-cf6b-4fd5-a129-3e5e017e8e08/bazotenafumuwosapari.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_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 5108 bytes
SHA-256: d2860f89754f67b873622c960ec555c9fc38a3ac53df1c6273fde21852db9256
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 11540 bytes
SHA-256: 81bb466ae1b87a3b9cb381bd377fdec5fbf01c678b6430346039e05d9c9705fc

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