Malicious PDF — malware analysis report

Static analysis result for SHA-256 baae748e2b8aff42…

MALICIOUS

PDF

80.5 KB Created: 2021-04-08 20:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6a24b54abb9ed7dd97a700592e44aa94 SHA-1: c9ba1dee4ebaf3af250eca0f735df54aff3bcb80 SHA-256: baae748e2b8aff422f65b066dbb29624caa0dd6bea20fb6d156716c7f854164c
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a search query, which is likely used as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=what+year+was+my+marlin+39a+made PDF link annotation
    • http://nipizakevenuvis.scienceontheweb.net/mojapefarokakopizuvap.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/gigiiia/25519465156.pdfIn PDF document text
    • http://fuxewofuwikafu.iblogger.org/modelo_biomedico_y_biopsicosocial.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvaworizon/fMfWnjf/81788723766.pdfIn PDF document text
    • http://neliwiveles.22web.org/binodumuna.pdfIn PDF document text
    • http://xizunamorazoved.iblogger.org/what_is_the_difference_between_meta_analysis_and_meta_synthesis.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/family_feud_ps4_how_many_players.pdfIn PDF document text
    • http://kizuberuzusa.iblogger.org/nopinel.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/Fo9iigc/70537077987.pdfIn PDF document text
    • http://situbune.iblogger.org/information_about_neet_form_2018.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/halo_recon_helmet_foam_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/aQ7Uarj/jepogubilopufizoxuteba.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/22264606872.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/7vqVicq/departmental_exam_december_2017_answer_key.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://babevuzax.epizy.com/7_level_cascaded_multilevel_inverter.pdfIn PDF document text
    • http://patupafu.rf.gd/b_pharmacy_syllabus_2nd_year.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_8ec775e72ef54fc1917aa7ce282f9383.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_7185ddfad0554dd081dfbd9639b07419.pdf?index=trueIn PDF document text
    • http://wadoromutisagar.myartsonline.com/biodynamic_farming_books.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/viwuvajegamodujixigimomap.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_f246a22155e34ee485abff457ca5b8a2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 5272 bytes
SHA-256: 0bf8e6ac74e701d8d4ec63ef41d8075b849e18af9c00bc28617c2ced0e9b8d52
font_01_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 11772 bytes
SHA-256: 2822e40940cfb20007aacaa5baefc6f5b7d1f761ebe99b8e5d9abd29c363a0ef
font_02_sfnt_off0001265a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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