Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa578d33b04510d6…

MALICIOUS

PDF

77.9 KB Created: 2021-04-03 11:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c7fc907afc09a956987936d0961342d SHA-1: ea279b36fefae76d952f64372ebf0fa110d2b7c9 SHA-256: aa578d33b04510d625baf31c919a730f8dd42ca788eaa0dd6d7c6396366cb9ce
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://pelibifir.ru/strik?utm_term=can+you+eat+pickles+on+green+smoothie+cleanse PDF link annotation
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/wikar.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/Dvjhfvb/55916799931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6009cacf5a214.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/H2hd6Fk/dungeon_defenders_awakened_ps4_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dgjhPwx/dewexesuwiwanetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_606357c0b38a2.pdfIn PDF document text
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/venipaxu.pdfIn PDF document text
    • https://lemagijazifar.weebly.com/uploads/1/3/2/7/132710763/3ee9aaf876de7.pdfIn PDF document text
    • https://pavexoseg.weebly.com/uploads/1/3/5/3/135315086/nilupizud.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/ijfiaj0/mind_fresh_music_for_study_mp3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_605007359b86b.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/Uj4hbjj/barbershop_cast_billy.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/fotepopunaj/43325198014.pdfIn PDF document text
    • http://lerumedinopox.onlinewebshop.net/criminal_profiling_an_introduction_to_behavioral_evidence_analysis_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d343109-5f24-45a9-ae73-323111969207/20226884160.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/9146920970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00a0a47-f09a-41b9-8c3a-bb801b70f37f/how_to_set_up_the_honeywell_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/72031550975.pdfIn PDF document text
    • http://farudigenudoze.onlinewebshop.net/53624932388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf626f9-5818-4dba-a985-f6700f33c443/cpm_algebra_1_chapter_7_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/43084836563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c101db-22c3-4d0d-9258-cca1c59ff5a6/caterpillar_forklift_parts_catalog.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_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 5420 bytes
SHA-256: f6d40a5d16826b9cdcb4f2e292beee6fc22789d839e24224b790f03755d5c15a
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 10876 bytes
SHA-256: 1210db1ce79e637cb2eaaaa250a70a494f57c238010fdc96124039439229b24a

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