Malicious PDF — malware analysis report

Static analysis result for SHA-256 0709de6e1e6f2654…

MALICIOUS

PDF

71.8 KB Created: 2021-03-20 23:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dddaca39eea4100a5cba457ef2197ec2 SHA-1: ae5f419321cda68dcfdeab3e68e7b873b5caeab0 SHA-256: 0709de6e1e6f26549effaec7c4bb3c2ce54e0b19231d9499c742158dafb3a980
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wix?keyword=superstar+smtown+hack+ios PDF link annotation
    • https://cdn.sqhk.co/butemobe/aZSeria/pawaxiburakimafarudil.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/pgCmy9T/buwegobovizox.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/66786931428.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/lenovo_t430_intel_core_i5-2520m_specs.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/effective_written_communication_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/i5ljdii/68180885589.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/NtgfggZ/75539239254.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/61214495080.pdfIn PDF document text
    • http://zotonurapad.22web.org/lerolajezuzowabiteveluniz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5fefaa58ea02e.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/1I7KBCw/free_instant_online_crossword_puzzle_maker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_5fd1831c3ff29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_b5de1bf3c3c6499da66d5e96d0dea514.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1908b6cd-917f-4c76-a6bb-9f8d1cb78a58/sejufog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941b2fd1-2866-4371-82bb-c81c5a5639a5/what_are_the_4_basic_philosophies_of_punishment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae3d172-cb85-4316-a500-9e4c34e3cc74/rimuxevorijaxekuzupavovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17d8344-d040-4656-a7e7-e47f364cdca7/bofiwevibilesudagoxafeba.pdfIn PDF document text
    • http://fobugasa.rf.gd/sipavelu.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_d9526916fa094d0085d6d2a0f917bb55.pdf?index=trueIn 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_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 5400 bytes
SHA-256: d9f0a857202dc268e612bc998be6dac1758a61808436d23b8fbb6822ec39b7b4
font_01_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 11388 bytes
SHA-256: 37ae015ac1875a7cdeb5ca1f5b01703cda4dd4c0d6ed840c9dd77ec4a2a592a1

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