Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b8b182558ac8f9…

MALICIOUS

PDF

105.1 KB Created: 2021-03-08 11:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33d78addec9eaeee36aeb3fd056918c9 SHA-1: 5c322c7cdad1df63435c8bc56b7c50ad98ed6fc3 SHA-256: e4b8b182558ac8f92ccad54414cb47abb19ce9f3ee07e22b0c82dc0f0b81ee15
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 0.9998

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://vilenefex.ru/strik?utm_term=17+positive+psychology+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ff1cd7ec0f98.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/ihFhjje/tezedofudexekevifozobo.pdfIn PDF document text
    • http://xbet1.fun/76897809981b6vlu.pdfIn PDF document text
    • http://todayit.pro/fadofibojemepiwubibonovr1iv6.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/hjlTgcV/dune_book_3_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_6022520f7fb3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_60218f59c2b2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5fe458436bf85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_5fd60d7189a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_604173b5ec0c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fdecb25eba1b.pdfIn PDF document text
    • http://instapriz.online/wigosukikowod3akm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/lg_true_balance_washer_ue_code.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/fisher_price_space_saver_jumperoo_height_adjustment.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/sagiwikelunufokesedawita.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_7c0c6c97b8304f43a80fb2008f16d683.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_c6e5ce77cf5f4d1bb5d98b8412e20c0d.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_fb1b72b1669c470697ff5a8745d4dd75.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

Related samples 4

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_off00015f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F00 5472 bytes
SHA-256: 031bedeee5e8a7d38da010a360846e619c468bc1005e16fd204e367d2fe34c59
font_01_sfnt_off000171b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171B9 10996 bytes
SHA-256: f7bc5a3b5d17d4990ffa82c7c70c5586cf02f1e962fd5d04124b0f8c8ebb04d7

Open this report in the interactive analyzer, or submit your own file for analysis.