Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ead3e3c8c7a1c4…

MALICIOUS

PDF

78.1 KB Created: 2021-03-22 05:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6fe29b474519b73d15e655ad8c1e451b SHA-1: 972457480571466359a565ce72de219d97266b38 SHA-256: e3ead3e3c8c7a1c4dd96502728bed868424922ed2b2637adcda46c8b61e78504
126 Risk Score

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 0.9995

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://crophysi.ru/strik?utm_term=amplificador+de+som+profissional+usado+olx PDF link annotation
    • http://wixotuvotinunu.iblogger.org/blue_cross_insurance_claim_forms.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/vitexaworukibitexekogot.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/as_catacumbas_de_roma_grtis.pdfIn PDF document text
    • http://xobigapirig.iblogger.org/zeworenubemogewaf.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/javascript_full_tutorial_free_download.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/mitologia_griega_y_romana_j_humbert.pdfIn PDF document text
    • http://segovozeperi.22web.org/jcpenney_deluxe_sewing_machine_precision_built_zigzag_manual.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
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_72400ccaa686403885561fe60412abd5.pdf?index=trueIn PDF document text
    • http://vumafovixono.rf.gd/banulotifukevovepe.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/vedirome.pdfIn PDF document text
    • http://junonuzutivo.epizy.com/describing_adjectives_list.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/disgaea_2_item_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7084b8a-a0bf-49f8-85cc-cc38c218d8ac/what_does_a_support_specialist_do.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/how_cognitive_behavioural_therapy_works.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12052e1-c999-46c8-b048-3e9ac9d7a368/gupetojofu.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/how_to_fix_alto_sax_reed.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_015580e0f18849aba68306e5cd0874f1.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_12a3d5aedd824709b9fd6ec0254b14de.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_b5770569853d4ab5a92cdfb22c5e2d60.pdf?index=trueIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/alienation_karl_marx.pdfIn PDF document text
    • http://koxowasone.epizy.com/sword_art_online_fatal_bullet_complete_edition_walkthrough.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_a96e518803734bfea43b7b2a0dc49e19.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5160 bytes
SHA-256: d85dc0a371b0a5a2394521545ac1edb69a4f1430d642795b2111addbeb49f760
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 13088 bytes
SHA-256: 97d0e6dd77a256202931ab488a1243a3c2e107476ca371a722533428a0ff3ad1
font_02_sfnt_off00011c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C40 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34