Malicious PDF — malware analysis report

Static analysis result for SHA-256 52400a2f2cc81ef6…

MALICIOUS

PDF

101.4 KB Created: 2021-03-16 23:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 937c14bba9ad314a8ec791e9a3eb5300 SHA-1: dae53842d7fb6f64d5ef926f19c21dfad528e8b7 SHA-256: 52400a2f2cc81ef6d2742469b8ad55bb76ed47005b2bb63e3ca3b5669dcfa52d
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 0.9992

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://resalured.ru/strik?utm_term=la+siesta+del+martes+personajes PDF link annotation
    • http://1-bog.ru/wokumedesabolufatoxixofer45a2i.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/gilasosemededoxolafu.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/83116255331.pdfIn PDF document text
    • http://nashremont.site/best_tarot_deck_2020qrqqb.pdfIn PDF document text
    • https://mukojemugasab.weebly.com/uploads/1/3/5/3/135314074/mewomelofugadutup.pdfIn PDF document text
    • https://vedirivokezijil.weebly.com/uploads/1/3/4/1/134108565/vogoxilovez.pdfIn PDF document text
    • http://kewotij.mypressonline.com/1127977937.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/risosijut.pdfIn PDF document text
    • https://gajodugibo.weebly.com/uploads/1/3/4/6/134635488/7b133.pdfIn PDF document text
    • http://hookup755.fun/angora_rabbit_breeding_information07vpv.pdfIn PDF document text
    • http://amin-ukraine.net/zombie_top_online_shooter_2_downloady9fds.pdfIn PDF document text
    • https://xefomivor.weebly.com/uploads/1/3/0/8/130814633/bf06519b.pdfIn PDF document text
    • http://submonster.xyz/zuxanupapidalemewunilakaijtj4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/3526224584.pdfIn PDF document text
    • http://xobefojeb.rf.gd/74334262652.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/robot_coupe_r2_food_processor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce18444-6309-458d-8157-06d8bd54261c/ligitojuxonigibuvoloju.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/soundlogic_xt_tower_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963b3d9d-6bdf-4f39-a0c2-ccda0d96bbc7/how_to_compute_vif.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/dujugimajadabupumanubu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/alangara_vasalale_christian_song_free.pdfIn PDF document text
    • http://bagumusat.rf.gd/digital_painting_tutorial_photoshop_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b6eeda-0515-4b60-abe1-91586dcf22eb/underwater_wireless_communication_technology_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/eia_oil_report_investing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5607f0d9-4b26-4f95-9d78-16c56f7ab3cc/botufasorojowemuriw.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_off00014e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E08 5124 bytes
SHA-256: b01ac1f69ffd3b215b31581dca5a42ec4407f0d711a3813b3737b630d8b71cb8
font_01_sfnt_off00015f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F60 11952 bytes
SHA-256: f69e52b675c373352c66a7f7ba98483fde6541f8449d4b040a5d87f086acff64

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