Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb8bff170d27635…

MALICIOUS

PDF

76.3 KB Created: 2021-04-13 05:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b1ea009e0a866cc800af8ea5d5d37970 SHA-1: d552f49492ad7d5359cb912883cd2db26ded471a SHA-256: cfb8bff170d27635b253cd0056fad4350970b7729073ba428abbab9e3a7f3dc0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on a URL hosted on 'xezojetit.ru', suggesting it's part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure-based attack pattern.

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://xezojetit.ru/strik?utm_term=sony+a330+price PDF link annotation
    • http://allieshouseofhope.com/dwts_season_29_cast_rumors39d2q.pdfIn PDF document text
    • https://cdn.sqhk.co/pedagukar/chglbg0/kajimejoxazaxavam.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/ab5c828.pdfIn PDF document text
    • http://modernstyle.pro/what_is_engagement_in_brain_based_learning3umlx.pdfIn PDF document text
    • http://ig-copyrightnotice.com/41566959038qhne4.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/rofulesanudurexe.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/uijjiih/vuwunig.pdfIn PDF document text
    • https://sifelinapekaw.weebly.com/uploads/1/3/1/6/131637019/6391d5c.pdfIn PDF document text
    • https://zuxidonav.weebly.com/uploads/1/3/4/8/134867872/d2352893814a.pdfIn PDF document text
    • https://cdn.sqhk.co/madozozafi/giLjiNL/98688523580.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/ieghMXS/remakemogewiniruri.pdfIn PDF document text
    • http://olx-delivery.cc/kilesefotigovajad55h8.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/kavalukato/amazon_prime_now_app.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_d055ca7baeaa4a9f800c6c5c676ee515.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/john_g_lake_ministries_prayer_line.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/12592859224.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_81348927df944134be53fdb443d85270.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/78977533428.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_4977e1be8bcd44d4b97779ac930fa6b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gebukil/aswb_practice_exam_questions.pdfIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_de10024185e8469e8af54e5720b29595.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_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 5228 bytes
SHA-256: 55701215a52a6b39df705aa5a0326ff72033638445fd9a5b6ee8f04eb87a84c5
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10752 bytes
SHA-256: 6797868c4d81e471f5f32cc5865ecbff981b69c761babe0e21be31b2acd2fb40

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