Malicious PDF — malware analysis report

Static analysis result for SHA-256 2450271f58fcee16…

MALICIOUS

PDF

91.8 KB Created: 2021-04-04 05:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 07c3123ed219a3488afcf71ebfd1b5cf SHA-1: 59ea4d46e9812051b2ac24bd5f5ff5b92681b327 SHA-256: 2450271f58fcee16b385f76c49b85ba34f421c8e6e1bcffc3838729d639da6a3
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 0.9996

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 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://soxebez.ru/wix?keyword=worlds+hardest+game+5+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490116/normal_602e99523e903.pdfIn PDF document text
    • https://wanitovamuk.weebly.com/uploads/1/3/5/3/135303456/3768404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_604cfdfd2220a.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/parebofososewasadad.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/f11d0e9eb00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_6013c2a5d1051.pdfIn PDF document text
    • http://jixelaxoli.66ghz.com/nipazozujujumen.pdfIn PDF document text
    • https://bobilomagavakux.weebly.com/uploads/1/3/4/8/134868487/kojiduxikopof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_6018ca98b3162.pdfIn PDF document text
    • http://kilewigi.iblogger.org/a_song_of_ice_and_fire_online_read.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_6024a1c996ff9.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/feliso/personajes_principales_de_la_gallina_degollada_y_sus_caracteristicas.pdfIn PDF document text
    • http://gaxusalimub.epizy.com/67895670111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d665c3ad-9f72-4d1f-9453-5bdc8df3cedf/what_is_the_exclusionary_rule_and_the_fruit_of_the_poisonous_tree.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/integrate_sec2x_sec_xtanx9_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/brady_i7100_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abca903-6564-40cb-88d7-d8b3fc5e79c3/sabaxidezulofirixop.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/zinipowazagonafasa.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/85974460705.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/toxelibari.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/arteries_and_veins_anatomy.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/tuzusokel.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_off000125e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E5 5696 bytes
SHA-256: 3c862e73a3fb8450bb816f539acca79dc53e782d7a03c9d277e6d7461456b457
font_01_sfnt_off00013925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13925 12024 bytes
SHA-256: 779f0f51d50685ee21f619ce0bebb8232672debb24099fe9bb695ba901216a19

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