Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caf4c8d5756aa4b…

MALICIOUS

PDF

66.6 KB Created: 2021-03-09 19:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c04471ae7d2ed7dc6348ed764f34802 SHA-1: 2b317c9b7a89893cd4bd83dd2dc979290ffb066c SHA-256: 8caf4c8d5756aa4b112b63f5443cd1622add3dd8a71764703cbe774e514e8918
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary links points to `http://mupegutiwigo.epizy.com/37150305405.pdf`, which is flagged as part of a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to managing borderline personality disorder and mentions wkhtmltopdf, indicating it's likely a lure document designed to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

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://botokaw.ru/aws?utm_term=how+to+manage+borderline+personality+disorder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446289/normal_6019365a86d6b.pdfIn PDF document text
    • http://ranomurivokav.22web.org/adt_pulse_app_apk.pdfIn PDF document text
    • https://zazanopub.weebly.com/uploads/1/3/2/7/132712119/nelaga-wisobudofun-xugosabokebubi.pdfIn PDF document text
    • https://kekiwudegabute.weebly.com/uploads/1/3/0/8/130813612/7856965.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/fb98ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_6024568312a39.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/silavofanenisodoga.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/8b8247da3f1.pdfIn PDF document text
    • http://budonap.iblogger.org/android_sqlite_tutorial_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mupegutiwigo.epizy.com/37150305405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfe7b5c-2a42-4733-91bb-c28fcfe15a57/malisuxuzobunejunuv.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_738727d9e5db43ddb7905dc8bb0c41f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e6b347-b437-4f3d-871e-45ce3a89fab6/how_to_fix_sewing_machine_stitch.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/manual_sauce_bottle_filling_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/tofujiluligatogipemo.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_5010e5f965ac468787b6216cbee17a5c.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_a6e3407c42da48ad90b99d70038033e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/464df01f-fd6f-4d6e-9371-0dbeeda0c5fd/6028972395.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/alaipayuthey_tamil_movie_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c00163-e9a1-4860-89b4-de1106d48e6f/vovutiwaxedelovefo.pdfIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_edf5e174ca8a47578cae43079d8b3d33.pdf?index=trueIn PDF document text
    • http://gelaleted.rf.gd/91517340910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6be9a8-ea03-4c70-94fd-635e5d89a8ee/the_power_of_now_journal_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/application_letter_template_for_job.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 5360 bytes
SHA-256: bb82487cd1f6054e04d81d54668438efad6046d18cf02827e93439da419015f5

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