Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dee50df810803a…

MALICIOUS

PDF

76.6 KB Created: 2021-04-03 11:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 774c9ea410cde3c72df713bc9379c1d0 SHA-1: c7b56cb82c1a7d7807a2564995ffe38825ae546a SHA-256: 23dee50df810803a75d5048d0ab1ffa2be3e7ae619f13e1d25596aa44e0e888f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The embedded URLs and the nature of the heuristics strongly suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=does+cranberry+juice+make+you+poop PDF link annotation
    • https://gidaletibom.weebly.com/uploads/1/3/4/8/134881461/xedufarameja.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jhghXje/3201236821.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/xejafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jdEgehf/37683642859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_60217aab5e472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_60118b3c3d374.pdfIn PDF document text
    • https://rofizikijomosuj.weebly.com/uploads/1/3/4/0/134012810/belowudabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5ff1709f25e48.pdfIn PDF document text
    • https://buwolerujagelav.weebly.com/uploads/1/3/4/5/134580081/tugipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_60320e73ab10c.pdfIn PDF document text
    • https://kujoposa.weebly.com/uploads/1/3/1/4/131453526/vebuvuwejekix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_6057043168775.pdfIn PDF document text
    • https://milanabez.weebly.com/uploads/1/3/2/6/132695465/wexijinavevusuxazute.pdfIn PDF document text
    • https://cdn.sqhk.co/tobafixola/CigE3tb/find_my_android_phone_location_history.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/mapupemimokil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fd2c2810a27e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gurajitobad.rf.gd/beginnings_and_beyond.pdfIn PDF document text
    • http://vanomuwoz.epizy.com/grammar_games_mario_rinvolucri.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/54962697142.pdfIn PDF document text
    • http://novituwexuse.epizy.com/ielts_listening_full_test.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 5428 bytes
SHA-256: 31d92d85b82c134a66448f8c31c1035e5546f63f9d33e861f377c2b1d18dbc89
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 10480 bytes
SHA-256: 3f31bef8001d51bcf8c7c3a9b752bf1e465ae0aaf2ea5c4c84867d098c2d9ce1

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