Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe201b6541203b1…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 20:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b83d235f18eccd9d1807284e6d0f07b SHA-1: 147a79ed8b7f7782ad27f8f2976d19808a64ef6c SHA-256: fbe201b6541203b14e50bee5b9e67a64c629df26436c2a847ee3cff3e936b34c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://golowaki.ru/123?utm_term=b.+o.+l+full+form PDF link annotation
    • http://pozuvixa.getenjoyment.net/bafafebalazi.pdfIn PDF document text
    • http://silkhfig.bid/adobe_premiere_pro_tutorial_20190wk04.pdfIn PDF document text
    • http://naligixe.getenjoyment.net/artist_profile_template.pdfIn PDF document text
    • http://wide-take.top/sujejanafijoh4057.pdfIn PDF document text
    • http://lisolu.org/dugasu2o8ht.pdfIn PDF document text
    • http://chelobaka.space/its_kind_of_a_funny_story_trailerj4yhl.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/primary_cell_culture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52492bec-cd40-4059-9ce9-95e982e21859/holmes_ultrasonic_cool_mist_humidifier_hm411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7629ff-d620-43c8-9d80-d0874b8a3b4e/zawerojadedisojegegujali.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/1732076276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ec378a-87c4-4eb2-ad61-a8a6e9338845/50846806964.pdfIn PDF document text
    • http://najexenij.onlinewebshop.net/bcs_question_bank_file_download.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/csr_strategy_of_starbucks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b87221f-cdde-40ac-b921-ae7302282674/keurig_k400_series_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd85579-6a6e-4f68-bf38-121b0eee97aa/resudetupafejeforopotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8c030e-1ffa-4d03-a5e3-0c080eadea9d/8621039346.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/10th_new_syllabus_sura_maths_guide_download.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/69743233182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a09ced7-0c4e-4af9-b66c-4f169333ae2c/how_to_call_soap_web_service_using_httpclient_in_java.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_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 4604 bytes
SHA-256: 94f182b5df3945d079836f49a3e4a68832e3dec87d8a49ea8b9480f1e822c88b
font_01_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 11364 bytes
SHA-256: 06053081f63d5d733b8a5e5c5b1e53fe4c254ea029e85ab7a79ca28d52b44272

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