Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac393a126c3c8733…

MALICIOUS

PDF

75.3 KB Created: 2021-04-09 04:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f544c38bde02841b03ad2e0dead9b620 SHA-1: deee8b935adacef527f442d6731bce13c4b2b83d SHA-256: ac393a126c3c8733d3998665e052e9d84667d4549360d40fcc84173763f56383
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 0.9997

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://druttle.ru/strik?utm_term=microsoft+office+for+mac+keyboard+shortcuts PDF link annotation
    • http://itanah.space/66893568481wf5rn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_603f42745e643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_6048461cbe5f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5fd7b99cd4c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5fd3d20f584ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_6064d5866c6b3.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/DfjdifZ/general_hospital_spoilers_september_2020.pdfIn PDF document text
    • http://wepirafigezatid.22web.org/29173842815.pdfIn PDF document text
    • http://grizhoff.ru/9._snf_fizik_konu_anlatm_kitap_indirt1t8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_6068c3c5d7410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_60363293bc786.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/jjneDjt/super_rangers_cars_power_race_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ihTijQ1/nogigani.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/how_to_turn_off_service_engine_soon_light_on_2007_nissan_altima.pdfIn PDF document text
    • http://farvestnn.ru/lorokixofnwzh5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fed3ed4eb56f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495409/normal_5fe6cafd71ee1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimewitonuro.epizy.com/57077369057.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/best_answers_to_behavioral_based_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/how_to_use_rug_doctor_pro_x3.pdfIn PDF document text
    • http://putiweg.epizy.com/chilling_reads_to_look_out_for_answers.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_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 5540 bytes
SHA-256: 1c02fde9864ebb5b8f60f938fead2840cf0306602a813cfa879924a79616da9f
font_01_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 11484 bytes
SHA-256: 986f6c6219f4dfaf257bb92f687dd74336a5e3cf7c61089e7127f713a10cab1b

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