Malicious PDF — malware analysis report

Static analysis result for SHA-256 9097a500bcfcb1bd…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 00:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a3fdddbbd51f7cde1c251d4f494ea784 SHA-1: 97b6896334e095326df9906af347179ab6caa729 SHA-256: 9097a500bcfcb1bdad72c399e7a1fd6a9978e4093d768b4061ca95ba307c8525
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to suspicious domains, flagged by heuristics as a malicious redirector and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous obfuscated links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=what+is+the+purpose+of+a+deed+poll+in+trinidad+and+tobago In PDF document text
    • http://kanaxade.mygamesonline.org/what_is_the_safe_temperature_for_food.pdfIn PDF document text
    • http://ttop-shop.com/salupuomcjr.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/hobart_ironman_230_mig_welder_tractor_supply.pdfIn PDF document text
    • https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/4266083.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/constitucion_politica_mexicana_de_1857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_6009ab606f1c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5ffda3c9a9d1d.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/zulejakilasuvijasorigovotp14de.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hdjfjiu/penguin_pet_wow.pdfIn PDF document text
    • https://dojovirofolabi.weebly.com/uploads/1/3/1/0/131069789/mababiwireto-bopizut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5ff9b7f5acbdc.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/cuanto_cuesta_un_juicio_sucesorio_intestamentario_en_mexico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5fce67d3bba7a.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/00e691c8c4d191.pdfIn PDF document text
    • http://stankoff.org/rafaela_artner_fotos_tumblrqtgjn.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/moveku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/roomba_560_manuale_italiano.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/61859218700.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/puxigozogeridegonomipaw.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_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 5456 bytes
SHA-256: c87b2d16b5cab53fc82ca53716c386334740ab85ff70673a8bff554c82b2a2da
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10520 bytes
SHA-256: be5ceb36780ad6f7d619c0e43151c9abcb8429e4fab2b5b8a644faf53077b077

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