Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4e23631d6a2b7e…

MALICIOUS

PDF

81.8 KB Created: 2021-05-24 00:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e2a8d9b7f2f15dbbc2c74f1833cc0bf SHA-1: 5edf697fa6124a0712312a6fea9756bc730ab3c7 SHA-256: be4e23631d6a2b7e51976481a31ea9bb8e94017511913c95f6a73e641630052b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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 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://kuzutuzo.ru/strik?utm_term=basketball+stars+mod+apk+2019 PDF link annotation
    • https://firenalurafiva.weebly.com/uploads/1/3/4/8/134883348/fifukarepim.pdfIn PDF document text
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/0af369157a3b.pdfIn PDF document text
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/boter.pdfIn PDF document text
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/8687682.pdfIn PDF document text
    • https://fisuxujatuma.weebly.com/uploads/1/3/5/3/135345375/9777830.pdfIn PDF document text
    • https://megoximigiwuboz.weebly.com/uploads/1/3/4/5/134579220/5866905.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/kosapimujixofik_dokajajedum_musog.pdfIn PDF document text
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/4605778.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/1d67e24b-63ac-4231-9fef-9110155ab943/78513681784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd5c828-c351-49e9-b1c0-c20c942828cb/tamiya_super_blackfoot_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/20318656947.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/cheap_holographic_platform_shoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c70ee11-c150-45ec-8db7-e4169956025f/time_management_tips_for_students_during_exams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387b319f-2db1-485f-a22b-eeb853f3e63b/talevavodalidib.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/nopolawigawusu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/boy_scout_uniform_buy_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/12921183253.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/dikevenewitezox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378ced7e-4835-47ac-a4c5-2b9777a3d240/16546504777.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/37702514661.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/lay_of_leithian_in_elvish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1828c8-b3fd-402c-a94f-b454dff7a505/how_to_change_input_on_sansui_tv_without_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/51337582949.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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5840 bytes
SHA-256: cd27923a503f23c6066a40b46c521224433a8031d77c117e93d6027814823f6a
font_01_sfnt_off000105ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CE 22436 bytes
SHA-256: 36b39e4575ce10d0f1925abfe203d4e40911304d20813fa2b3f2475ed36a7119

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