Malicious PDF — malware analysis report

Static analysis result for SHA-256 570608d95fc07837…

MALICIOUS

PDF

68.0 KB Created: 2021-02-25 02:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8beebd48ffbb752b34fe53436a611d68 SHA-1: 116a65868af76d3235aa827f64b977e308b49474 SHA-256: 570608d95fc07837b53ff33a824a2e886558de1c00335e2303929b30a3f93de4
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 0.9998

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://jottigo.ru/strik?utm_term=sentry+safe+1250+dimensions PDF link annotation
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/nowet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_600043a883293.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/8280341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_5fe9ca120fd78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_6017b18322d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fd0d66509d20.pdfIn PDF document text
    • https://bidijogez.weebly.com/uploads/1/3/5/9/135993355/c463b8033ebfbb.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/nebuv-kugejomuvakafel.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/how_to_clean_bissell_proheat_2x_revolution_brushes.pdfIn PDF document text
    • https://solugelefeko.weebly.com/uploads/1/3/0/7/130740562/tuwanofabi-keruluxomewen-muberexazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_60244761ac5ec.pdfIn PDF document text
    • https://sixikubirosepup.weebly.com/uploads/1/3/3/9/133997641/wagogulijew-xutatodogagor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fc79a9ca8ff2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famojubosaved.rf.gd/hotpoint_tumble_dryer_repair_manual.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/35202701073.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/doteloka.pdfIn PDF document text
    • http://dokaginiw.epizy.com/what_are_the_rules_of_differentiation_in_calculus.pdfIn PDF document text
    • http://mibobugaf.rf.gd/pugebutofem.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/messenger_app_jio_phone.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_off0000cda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA0 5676 bytes
SHA-256: 03f6a259b408da7c314dbb89fde27a6d2222580ceea3b05ed4a2eda7c40c01e0
font_01_sfnt_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 9932 bytes
SHA-256: 9d6506f428f1490655531e419a1a289e964f857a0e48b24b622f0d7d83421d41

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