Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7898eba50ae1a46…

MALICIOUS

PDF

58.3 KB Created: 2021-06-09 20:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7689648b851adb592b27dc8f8afce249 SHA-1: d7609bd9c68d76c4e28c12dd3b3f1f23657ec63a SHA-256: e7898eba50ae1a46b584d240fb77c6f4c15d7ea196cf0016092ec7c095a5b095
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.6078

Heuristics 5

  • 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
  • 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://oniceh.ru/pbw?utm_term=atoms+and+elements+worksheet+answer+key PDF link annotation
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/serebivixaxuxej_vediziwede.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/7424938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_6041646258853.pdfIn PDF document text
    • https://vomukefepa.weebly.com/uploads/1/3/1/8/131872153/0ff9134cfe3965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_6019787144075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446784/normal_600a177fc76a4.pdfIn PDF document text
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/mexura-vodakeroxabit-kekojubevav-jusopafuweto.pdfIn PDF document text
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/riwako.pdfIn PDF document text
    • https://kenodajeto.weebly.com/uploads/1/3/4/4/134490943/fonepenife-tebowemabawemu.pdfIn PDF document text
    • https://pimimazeso.weebly.com/uploads/1/3/4/5/134523822/1751482.pdfIn PDF document text
    • https://zepekofudi.weebly.com/uploads/1/3/1/4/131407423/sadowuvabuvoten.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/leligufux-japijiwige-xununevu-wuxamipi.pdfIn PDF document text
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/sogijivudij.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/5123a45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d0b8f7-91f0-4073-8abc-8c50eb4a6287/55902308350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa1e0b7c-1770-4461-8371-7910ee1da48f/tableau_blend_your_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a72c62a-f267-46e4-9f18-9e5e38043548/how_to_use_samsung_dishwasher_dw80k7050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a016242-30cf-48fb-86ca-b57f96aa251a/kawarejiwekoxumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c14a07-9cbe-48c3-a222-54a377190283/67898013554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eab88e5-c549-4ac3-adc2-ac1fe451e885/reasons_why_romeo_and_juliet_are_star_crossed_lovers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325b31b9-67a4-44d6-8335-dbaa2d119f74/what_is_computer_hardware_servicing_hand_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57934909-c0b3-4213-bf1d-7cd00f9e5e4d/darkest_days_of_the_year.pdfIn PDF document text

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