Malicious PDF — malware analysis report

Static analysis result for SHA-256 19294724c2f9b745…

MALICIOUS

PDF

72.5 KB Created: 2021-03-07 08:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e0affa4bcf520a24b4318d152a150890 SHA-1: 56ceddf00577ead2c9600707fa369a9d2d26e145 SHA-256: 19294724c2f9b745412fa92e005ae2cd15e6a942ef2c87c6da890778f039dc5d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

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://zajinet.ru/wix?keyword=large+scale+systems+definition PDF link annotation
    • https://cdn.sqhk.co/buxifuludo/dS6xdV5/r_type_final_ps2_cheats.pdfIn PDF document text
    • http://gifozazupu.iblogger.org/48108070905.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/ejemplos_de_memorando_simple.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/ijJFhdk/fast_driftssted_i_danmark_registrering.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/jaworirivozokiwodowunu.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/VjGgslu/rapid_city_airport_long_term_parking_rates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_3e9c1b671bbe4a9a95e64b2783f6a771.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05edcb0e-6524-433a-a273-4d9a6722fb1d/seselaxokawenupuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f30f4d0-6022-4257-9f3d-29470f891494/how_do_i_change_the_battery_in_my_accu_chek.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/zerojomakunuvimuzinikibaw.pdfIn PDF document text
    • http://tawatibajat.rf.gd/why_do_we_use_holograms.pdfIn PDF document text
    • http://botusojulepeja.rf.gd/anemia_in_pregnancy_guideline.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/90116117497.pdfIn PDF document text
    • http://vobuketulina.rf.gd/precalculus_with_limits_3e_online_textbook.pdfIn PDF document text
    • http://toxisokipefofo.epizy.com/mailgun_free_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b567fe47-e04a-426e-9396-8ff2e9c17f55/typical_compressor_isentropic_efficiency.pdfIn PDF document text
    • http://xulifaxamozis.epizy.com/zonejejazamaboxokufopos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddac15bf-e819-4f6e-aa59-aeb1f0c32ed9/bunker_hill_security_36_led_solar_security_light_instructions.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_26625bb5120142319e98f831fd6920a9.pdf?index=trueIn PDF document text
    • http://tososite.onlinewebshop.net/53417779763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0110544f-4e56-46d1-9c75-0a20138fa0c9/what_are_the_12_biomes.pdfIn PDF document text
    • http://xasonivuk.epizy.com/dorenapelij.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_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 5384 bytes
SHA-256: 4bf8f95ceaff76e0a35d657854653b4853c7ac72881523c6083ca9025d46c3ea
font_01_sfnt_off0000f187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF187 10324 bytes
SHA-256: 67b3302183ad383038339e292790f4b743cb7f7698ada7d96c696b1e6fc48171

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