Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3537e8ae7b94da…

MALICIOUS

PDF

77.2 KB Created: 2021-03-20 14:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e125c9502f0679feb40d6c47c7b370f5 SHA-1: bd44602788bf08d92fdce8075e9f64f0e319de4b SHA-256: 0a3537e8ae7b94dad76934258376e2426655f40467d50b74783758e2f64c14e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, with one notable example being https://ponafet.ru/wix?keyword=body+beast+abs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple external links points towards an attempt to redirect the user to malicious content.

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://ponafet.ru/wix?keyword=body+beast+abs PDF link annotation
    • http://zodelem.mygamesonline.org/71064233308.pdfIn PDF document text
    • http://formblckr1.xyz/ft-857d_mars_modfag16.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/nimunukalokuxojedawod.pdfIn PDF document text
    • http://like-store.site/86439165047rddqo.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/71752221234.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/uud_1945_amandemen_terakhir.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/gastrulacion_en_anfibios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevejonitu.onlinewebshop.net/kelly_services_work_from_home_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8dc730f-57ee-44f6-9ed9-90009ca425d8/7787561011.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_ab2f6ed15a4c4ebd9d8f02f0fb09d485.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9bc6da-af2f-4f74-9083-5420510a541c/what_is_resound.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/how_to_reset_voicemail_on_mitel_5312_ip_phone.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_10f8d2061659448795f30b6b6c8c2ce7.pdf?index=trueIn PDF document text
    • http://rizivubonulej.atwebpages.com/how_to_use_midea_pressure_cooker.pdfIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_887e118af36b4b7da0d20d22ef67ad89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/241fd59b-1947-4b38-ab95-8b0fbdbb7dc4/bilofoloximejolufokubojo.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/women_of_the_bible.pdfIn PDF document text
    • http://jujobope.atwebpages.com/nuxerotilotuzuvoriweze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0848adc6-f0f9-455d-957c-56a481f9ca1c/waxadujixoxowufev.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 4980 bytes
SHA-256: dd89917f4921031585685d2eab437694b6ad46466aea6caa8f7202b5139cb051
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10932 bytes
SHA-256: ca24319c78cd71f2a49818c029c2ce23f5a3bbf705d49de8f6cbdf038344117b

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