Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89446dae90057a5…

MALICIOUS

PDF

74.3 KB Created: 2021-04-02 19:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2937663346741897e5d073b3859c1f85 SHA-1: e4d2ac1878284eab0cd415bd6801b2a1edd8b2b2 SHA-256: f89446dae90057a5c4316f333cad3e4d19a54d68a83147ca2753bec87d41a3b4
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/123?utm_term=plastic+backed+dust+sheets+uk In PDF document text
    • http://pokupka.space/whirlpool_water_filter_edr1rxd1_lowesywviv.pdfIn PDF document text
    • http://meetraisins.club/mexovumozjgff.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/brainstorming_en_espaol.pdfIn PDF document text
    • http://levantemosaic.com/2012_uniform_plumbing_code_illustrated_training_manual_with_tabsrus02.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/bickerstaff_neurological_examination_download.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/wonipeximikowi-ridasopi-vozuxamokunejo-pokafafiweko.pdfIn PDF document text
    • http://laxana.ru/98353464311xn03h.pdfIn PDF document text
    • http://5coupons.info/60215293356dt7nk.pdfIn PDF document text
    • https://mezinetoxapim.weebly.com/uploads/1/3/4/8/134887379/barav.pdfIn PDF document text
    • http://7lessons.website/30415883793hp8ik.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/mumalebubajununoxazodili.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/pumakirataz-bimufodele-tatubi-subomitiw.pdfIn PDF document text
    • https://jizesemud.weebly.com/uploads/1/3/2/7/132710762/d5006de01265f5.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/765487915.pdfIn PDF document text
    • http://basiditdcf.space/install_canon_mg2520_without_cd5sczi.pdfIn PDF document text
    • http://raisinshq.club/kojugixujimboyg0.pdfIn PDF document text
    • http://geesecam.com/wenumipir1zx3.pdfIn PDF document text
    • https://lufigukinuma.weebly.com/uploads/1/3/2/6/132680864/012ec9ae3a.pdfIn PDF document text
    • http://avtoshtorki.shop/dovofidamasewitatawixunedp6dt.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/e74b01c42363c75.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/0717a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molujafit.atwebpages.com/business_communication_journal_articles.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/42747992746.pdfIn PDF document text
    • http://suruliloxapesas.myartsonline.com/benkelman_beam_method.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/balegameguwevenixexen.pdfIn PDF document text
    • http://jorasixu.myartsonline.com/jikutigiwofokujo.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_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5136 bytes
SHA-256: ec323403ce1b1b41c812dc6eb9ff8f2e83843d43f318d098b4203c6265698d84
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 11328 bytes
SHA-256: a537f264aecf0c8810c019e74fc1bc288c2a031ff0f8e4acf49464c91a27ed41