Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3abfdb32d1890d…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 17:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0bd68fea72b4ad236f5ee6d38264bfa SHA-1: 70d3cf7ec4dc74c05ee7faaa6e7897feae16fbce SHA-256: df3abfdb32d1890dfa21e19284eb87a24ec6c437c0df6059ba3417495e6af9d8
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=a+touch+of+class+movie+download PDF link annotation
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/rurofekuwame-negerux.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/88617505270.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/final_walk_through_and_closing_same_day.pdfIn PDF document text
    • http://dommasters.site/st_vincent_hospital_bridgeport_ct_patient_informationst5ab.pdfIn PDF document text
    • https://tewoxole.weebly.com/uploads/1/3/2/6/132695213/luzazede-mugutexexomon-jugaguvajudaxeg-naranajijudobut.pdfIn PDF document text
    • http://braco.ru/fibuxivubai8m3r.pdfIn PDF document text
    • http://lipazegeboludep.sportsontheweb.net/10521124386.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/fazufel.pdfIn PDF document text
    • http://arbitestpark.xyz/vunupemixijevebazaxilum5cf0f.pdfIn PDF document text
    • http://natlab.ru/bekumudolezepopuxinez10kdz.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/garunu_luwevetiruxorem_tavupetojata.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/bebosonod_bodajiwoteka_bokefuvub.pdfIn PDF document text
    • http://megahit.space/dive_log_book_templatefcfgf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidilig.onlinewebshop.net/34256968491.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/62706872982.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_7c330fa861f94c8fae68be400e0882d3.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_0bc0ff383dcc48d680c29237fa756731.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegovev/gavab.pdfIn PDF document text
    • http://jujobope.atwebpages.com/82898275938.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/tiwisotirafekofezagosir.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/summer_infant_monitor_replacement.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_121b4003c8814ef795b06bf6215da562.pdf?index=trueIn PDF document text
    • http://xidalagep.myartsonline.com/88828127229.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/alchemist_leveling_guide_ffxiv_reddit.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/brother_mfc-j5910dw_troubleshooting.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_d385fa444d52429087d14dc64db10202.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_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 5308 bytes
SHA-256: 1baad1c3cd3fd1faaf8b9921056263f850f885d5e768964cc267edc14b7e8e61
font_01_sfnt_off0001096b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 10964 bytes
SHA-256: 18ada934d05d0234d29ad3c742398871f1fb9f5577d5a5638f8abe1a2a3f9153

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