Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bed9af5c6ff88fe…

MALICIOUS

PDF

75.8 KB Created: 2021-04-29 11:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75272b26d3b11aa5e1f5289e4907f052 SHA-1: b088be3013cb14b4096650c043f218870022eed9 SHA-256: 2bed9af5c6ff88fe470190faa045308a1cf9e3dd4e3e70338780c75ec9dc4b78
186 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 0.9997

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 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://jacksth.ru/strik?utm_term=oppo+r15+launch+date PDF link annotation
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/4170212.pdfIn PDF document text
    • https://nasaxedinevizuv.weebly.com/uploads/1/3/4/7/134759800/toteginanawotitufoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_60695368c103f.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/ib8H352/ludo_king_online_play_plonga.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/51774280167.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/hibiajc/30101896043.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/49050403333.pdfIn PDF document text
    • https://pirubanulap.weebly.com/uploads/1/3/4/8/134847944/4575612.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/WT8ejbM/planet_blast_mod_apk.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/determination_of_refractive_index_of_fats_and_oils.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/iimt5ux/ultimate_dinosaur_simulator_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488130/normal_604bcbb7b0cf0.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/27983ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_606c84366a7cc.pdfIn PDF document text
    • https://xejevegufukax.weebly.com/uploads/1/3/0/9/130969627/2779775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60159c5a44041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_602eb33d4e823.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/Cf7jfsF/lafenuguvumem.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/587409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japamitafixe.myartsonline.com/ledagov.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_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5184 bytes
SHA-256: 05c8577de638f09875e40ffd206984f680df5bafc168fd4a905a49eacc4ac6bd
font_01_sfnt_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 10940 bytes
SHA-256: 020815a910ef2fe2b760596ecb7d4d1ab1d2b4fe9768606cd3c55edc92f63e82

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