Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd885f5036b2706e…

MALICIOUS

PDF

76.1 KB Created: 2021-04-29 10:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7648348061802b936a932e067dd2ebb SHA-1: 90e8b8c6a6e6e9b1f1aa7a4bbee3e56141460cac SHA-256: cd885f5036b2706ed0c77be5c509d5bd3e6e358f46e9250867b6a9477b9a30d6
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 0.9996

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://leonvi.ru/strik?utm_term=how+to+find+the+probability+of+multiple+independent+events PDF link annotation
    • http://fakibukilab.22web.org/como_hacer_nieve_de_garrafa_paso_a_paso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_6027608ce880c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_603eb2751a3ca.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/edijphi/88453551512.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/how_to_drain_lg_smart_drum_washing_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_6059d202ed250.pdfIn PDF document text
    • http://texewofe.22web.org/allegheny_river_fishing_guides.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_603a17dd8cf50.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/cigkjab/21943630782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_60062681ebea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcda5ec4942b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6029873037fdc.pdfIn PDF document text
    • http://bekavukida.22web.org/54444345768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molobexe.rf.gd/33354210962.pdfIn PDF document text
    • http://liwajefafujud.rf.gd/43090848463.pdfIn PDF document text
    • http://reladefuxuna.onlinewebshop.net/aspects_of_political_development_pye.pdfIn PDF document text
    • http://pususarejopo.epizy.com/asm_handbook_volume_1_download.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/wodosemesalujiwi.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/34798559608.pdfIn PDF document text
    • http://kaguwetu.epizy.com/zoom_h4n_recorder_manual.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/soges.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/87329304876.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5636 bytes
SHA-256: 500bcec7205eae5128d0e3e4130a8e7fa2adf8f52d126c0b7276d866ec3a554f
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 11816 bytes
SHA-256: 2dd88286f2bdd37b6b3da7ce911cd4502281086371b4f60fe310f96879d385ca

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