Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afa8a0701937e4a…

MALICIOUS

PDF

76.3 KB Created: 2021-05-11 16:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1f845afae6490fce5416096f33391ca5 SHA-1: 6b5f7602eac169cff6a5c25aaf1d4377a4ea096a SHA-256: 1afa8a0701937e4a515afbd624375ff0621949444858fe81086ec6b5a18ac1fb
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://dugedepap.ru/strik?utm_term=how+do+i+reset+my+roku+stick+without+the+remote', is presented as a help guide, likely to trick users into clicking through to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+do+i+reset+my+roku+stick+without+the+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472188/normal_6008eb57608aa.pdfIn PDF document text
    • https://baduxobenef.weebly.com/uploads/1/3/0/7/130739850/1228974.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/4381663.pdfIn PDF document text
    • http://teluvisi.iblogger.org/arduino_ultrasonic_sensor_tutorial.pdfIn PDF document text
    • http://bilkaita.space/icc_500_storm_shelter58119.pdfIn PDF document text
    • http://rofodas.22web.org/bodyline_autopsy.pdfIn PDF document text
    • http://ryursew.space/brentside_high_school_uniform0gd12.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/rukil-xizod-roxivopemodosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fe1b3a18cb79.pdfIn PDF document text
    • http://govnosiakxws.online/89591837143fwezi.pdfIn PDF document text
    • https://liritetujom.weebly.com/uploads/1/3/5/3/135310948/sukalile.pdfIn PDF document text
    • https://wemivera.weebly.com/uploads/1/3/4/3/134311686/7213252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f516a5e5-1936-4b34-b436-a929b3a34b8d.filesusr.com/ugd/774001_992a852ed44749fa8554dbf9f7ed303f.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_883b6fed43364bd89aef9277467a8a35.pdf?index=trueIn PDF document text
    • http://levurugagizov.rf.gd/25655780960.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/minecraft_modpack_1._7_10.pdfIn PDF document text
    • http://moxozejoxolisuf.epizy.com/newedeviwagibulum.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/naxevodilegen.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/82365489320.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_206067cb4be34d5eb8da73c76753edb3.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_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 5156 bytes
SHA-256: 622e8011bb39708016e1768d71dfd57676b9c8d0b39cbcaddd7028738d767418
font_01_sfnt_off0000ff28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF28 10624 bytes
SHA-256: 978c88f0e209575832d15d78a33f7203f0f671ce9966cca9bc48387ad853c448

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