Malicious PDF — malware analysis report

Static analysis result for SHA-256 26acce8e739b36a2…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 06:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f33c9c3fe78c5dc37f193bc89154847 SHA-1: e7e4bb447d9e72ced6c269a64fdac99c25abeb50 SHA-256: 26acce8e739b36a2ac83216ebfd9202a09a92fe3698e2a242b3ad1d1b1e665b7
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 0.9997

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://resalured.ru/wix?keyword=hot+wheels+race+off+mod+apk PDF link annotation
    • http://kikababono.mywebcommunity.org/92880648311.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/0f5ef34ad9b7c9.pdfIn PDF document text
    • https://pagukusiko.weebly.com/uploads/1/3/4/6/134631218/jebofoxutesez.pdfIn PDF document text
    • https://kegozorud.weebly.com/uploads/1/3/0/7/130740561/f335d.pdfIn PDF document text
    • https://jixekibak.weebly.com/uploads/1/3/4/5/134504946/4924d2518e03da.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/2744228820.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/icijih9/27545146551.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/ifhjrDO/golden_spike_brigham_city_ut.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/NnYhf8H/savefopelekegakeruju.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/XuicTjj/kenodujozetuvibojinod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sosubixoza.rf.gd/31428886255.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/lodikep.pdfIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_5dcd85318dae4d20a77c624e5b105e17.pdf?index=trueIn PDF document text
    • http://puxetixunelotaz.epizy.com/activesheet_exportasfixedformat_invalid_procedure_call.pdfIn PDF document text
    • http://juwejaju.rf.gd/36351587583.pdfIn PDF document text
    • http://jovulotako.rf.gd/blessing_shumba_step_by_step.pdfIn PDF document text
    • http://kibowetesuve.rf.gd/easy_viola_sheet_music_free_printable.pdfIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_386ae18354a14221a853be4b1e23a3ae.pdf?index=trueIn PDF document text
    • http://negubikalijewu.epizy.com/chorionic_sac_formed_by.pdfIn PDF document text
    • http://sevetise.rf.gd/conservation_of_mechanical_energy_worksheet_answer_key.pdfIn PDF document text
    • http://ketunetu.rf.gd/antebellum_reform_movements_women_s_rights.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_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 5512 bytes
SHA-256: 21d51d34e094d87afb967aac2baf29ee43a961a12d9878b7e8d4c44944950226
font_01_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 22472 bytes
SHA-256: fc6029d5e85f65a4f378bece86c7392958d8a5b9857c5f138d2307bf73ab2781

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