Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdf6d1a5384f2eb…

MALICIOUS

PDF

75.2 KB Created: 2021-04-15 23:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 79e6f29fbca8c9724a8636306dbfb1b2 SHA-1: df52d8ab9cbe7a0c50722f133224e195a892a5e8 SHA-256: 1cdf6d1a5384f2ebb5c7b0788232e5264f90301378fc67033e992cea38d0d79c
126 Risk Score

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 0.9992

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=starbucks+coffee+cups+christmas+2019 PDF link annotation
    • http://rexevivejegox.scienceontheweb.net/problem_solving_through_recreational_mathematics.pdfIn PDF document text
    • http://sikevemekoma.mypressonline.com/functional_reactive_programming_book.pdfIn PDF document text
    • http://pukitifafizeba.mywebcommunity.org/gotejaber.pdfIn PDF document text
    • http://razvivatel.blog/bhakti_song_dj_mix_2014ywp52.pdfIn PDF document text
    • http://wugafis.66ghz.com/ancient_greece_and_rome_study_guide.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/39121185446.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/vizilitopik.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/xojijiforixafebosim.pdfIn PDF document text
    • http://lakcherie.ru/did_hardin_cheat_on_tessa_in_after_we_collided_moviek0ycs.pdfIn PDF document text
    • http://selizixid.iblogger.org/brc_issue_7_audit_checklist.pdfIn PDF document text
    • http://businessoutsourcing.org/jilolifiramaneponalewevel8t81.pdfIn PDF document text
    • http://itclick.pro/gixuguwopuwinmxvmy.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/aba_autisme.pdfIn PDF document text
    • http://olymptrade.buzz/marakofavumapkq.pdfIn PDF document text
    • http://wadobezofe.iblogger.org/vapedetanovokuwuxapiz.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/78886548235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivadanoxibive.epizy.com/97199889401.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_128793f7088f4c59889706f62786607c.pdf?index=trueIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_45b093db073143c39083f9f68b587c0c.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_5a7478fa65854586839edeecaff98461.pdf?index=trueIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/rafakaladeluzijowuzujawev.pdfIn PDF document text
    • http://mikijelirisu.epizy.com/bharathiar_university_distance_education_mca_syllabus.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_393f345eefa2454aa936bbdfaa290daf.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 6012 bytes
SHA-256: fa28f4e678657655da01a2e65e4213e50e5c1a22659f148d11bb26539c6e36da
font_01_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 11116 bytes
SHA-256: e32438a97b1d17b86b1638bf89d70b6415b6ca5b438729123abc8a6e639af7af

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