Malicious PDF — malware analysis report

Static analysis result for SHA-256 79719aa7be3f16a6…

MALICIOUS

PDF

85.6 KB Created: 2021-04-25 00:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 325d0088ec468b54a292e138f78cc3bd SHA-1: bcfed4ac818396a23c8137785df0b14b47237a55 SHA-256: 79719aa7be3f16a61804d3b6f507ab28860aff4aeecc18235f7c4064c47c0d71
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious content, as indicated by the ClamAV detection and ML classifier. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of outbound links designed to manipulate search engine results or direct users to malicious sites. The presence of an embedded URL and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=the+cold+game+movie+netflix PDF link annotation
    • http://norasuzajo.mywebcommunity.org/slope_formula_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/gaNFhjU/woodworking_cnc_machines_for_sale_australia.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/2020_ford_mustang_gt_premium_0_to_60.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/conair_clippers_power_screw_adjustment.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/6470284.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/dChiWnQ/standoff_2_apk_mod_money.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/hcdQhgD/color_picker_hex_from_image.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/BXihieC/82111567991.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/pjc8lkN/33181637109.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/already_just_yet_ever_never_exercises.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/6bee95de59e6.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/jf7gjha/wufibufudafux.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/gdjhghg/azamara_journey_deck_7_plan.pdfIn PDF document text
    • http://govuled.mywebcommunity.org/adayalangal_novel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitulogakapede.myartsonline.com/42505921690.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/behance_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/contrato_de_arrendamiento_casa_habitacin_baja_california_para_imprimir.pdfIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/ketexeban.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/sigutumobivagedusino.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_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 5240 bytes
SHA-256: f085817275f6aa2105a44fe6d0caa96c1e83daf263cc75179b5b33548f4c4744
font_01_sfnt_off000122d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D8 11728 bytes
SHA-256: 8be9e9fbd5f507ea9330b629e66bc3c4ee9a8916a13f3660dd8b2f2517a0a089

Open this report in the interactive analyzer, or submit your own file for analysis.