Malicious PDF — malware analysis report

Static analysis result for SHA-256 00eeb930f2583d85…

MALICIOUS

PDF

69.4 KB Created: 2021-03-12 19:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c0ad25c8fb18883b31362d3afdff4ba2 SHA-1: 0f1d0200b4031692193c15fd2db1d1ce1848a448 SHA-256: 00eeb930f2583d85059f976e2b3ad3783180325a36b74e4c3a99d8743f2bb0c8
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=bubble+shooter+unblocked+games+alpha PDF link annotation
    • http://my-favshope.online/factors_for_abolition_of_slave_tradee659n.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/animal_farm_quotes_about_napoleon_power.pdfIn PDF document text
    • http://playmarket-online.com/87538276915nv94t.pdfIn PDF document text
    • http://mavitrade.com/9731989157cge2m.pdfIn PDF document text
    • http://numulul.mygamesonline.org/lord_of_the_flies_summary_chapter_1-8.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/beats_by_dre_studio_2_wireless_outside_exterior_panel.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/kenmore_series_700_washer_error_code_du.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/db37ef41-93f6-4c6d-8549-18de17fd2d13/kefader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba196c5-c2ef-4c15-a89a-01b3d3d56eeb/how_to_reset_a_disabled_iphone_without_computer.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_cf6a89bda26a42c1b290ec456cdf43e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bdf2f4-3705-41c0-ad22-e0e8ec9beee8/vezutexalopujepepazipipur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286577fe-d5eb-4e2a-b737-2e0514319ae6/does_cellulitis_always_need_antibiotics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10decdc-432d-4114-851f-0bdcf8bca102/fomoruno.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/4273013711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd63118a-54dd-4d7d-ae34-a832c7624204/is_sensory_processing_disorder_a_learning_disability.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_487a4f21a73c46c0a5fb78e1b48b19b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4f6cb2-c57d-4f56-8429-77b4162ef044/how_long_do_you_cook_a_turkey_in_a_butterball_electric_turkey_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e734ad72-6215-4ba2-b9d7-4baa57f0172d/39201143463.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_9dfa4c17a19f44f3afe2ba5896efa107.pdf?index=trueIn 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_off0000cfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEC 5740 bytes
SHA-256: f97dd30489db88e5d13f868e233bda6514d9e811846c04916aa3118bf00f3838
font_01_sfnt_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 10420 bytes
SHA-256: 39dd76d6c2d8981be39cc47dbb39d9b208be8c8de0b37812bb96bdbe99d79794