Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c05acbe137ee5b…

MALICIOUS

PDF

82.8 KB Created: 2021-04-27 05:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2d550dfdc343991fdcf30a4521576407 SHA-1: 53c9cde00048fe739b38f33bea8a4252064beb51 SHA-256: a2c05acbe137ee5bd7efeb5715db761fd919a8cde4fa9a383c69362e60b053f8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be a lure for a carpet cleaner manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://gimoguvi.ru/strik?utm_term=bissell+proheat+plus+carpet+cleaner+manual PDF link annotation
    • http://nunegotopexipo.iblogger.org/bhakti_song_video_dj.pdfIn PDF document text
    • http://kuxuzozemoloxiv.22web.org/67308029534.pdfIn PDF document text
    • http://godulonu.22web.org/16409832725.pdfIn PDF document text
    • http://xuvavarapegu.mywebcommunity.org/acm_icpc_problems_2020.pdfIn PDF document text
    • http://fedexonep.mypressonline.com/folajomagenaweka.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/25985277467.pdfIn PDF document text
    • http://borolepejawodur.22web.org/mejuxorupawavomofo.pdfIn PDF document text
    • http://bijowuxupolapi.sportsontheweb.net/7626548371.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/fuwifetetanunilasagofe.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/71697769891.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
    • http://jugomirusulove.atwebpages.com/ccna_routing_and_switching_commands.pdfIn PDF document text
    • http://fewatebuvif.epizy.com/ecologia_e_impacto_ambiental.pdfIn PDF document text
    • http://xoxerulegud.epizy.com/professional_bio_word_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2173daed-fd61-4030-be6e-342198bf0036/busted_by_the_feds_2018_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3781085-1b22-4d03-bd38-9fe936787272/pubagutamalis.pdfIn PDF document text
    • http://kojevas.epizy.com/how_to_find_dc_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0a6106-0e69-4843-a4dc-f847e21f5c0f/zediderumubuxusawibowarox.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/76103567218.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/lagu_kisah_cinta_suciku.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/amlodipine_package_insert_davis.pdfIn PDF document text
    • http://lawigut.rf.gd/lamia_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90b059e-1d4d-4c17-a016-027aa5300432/negocios_junot_diaz_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847cd40c-7b8a-4b74-b9d9-4dc6535811f4/sedikigapa.pdfIn PDF document text
    • http://dowuxufab.epizy.com/15839958552.pdfIn PDF document text
    • http://degeluvugo.rf.gd/gifukizuxi.pdfIn PDF document text
    • http://xumasadepa.epizy.com/xigusazosojemasunamaxij.pdfIn PDF document text
    • http://jajumuxepuj.rf.gd/74060368663.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 5104 bytes
SHA-256: d478c99c801a6b0771f36ff99a8391746bb1755389cbb73f8c6f779de0a2131e
font_01_sfnt_off00010584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10584 11736 bytes
SHA-256: 8e4ec899ab3489af39b5e88bc47e9107ef4ae9a23bf7fd89c6a6481d2f3fb451
font_02_sfnt_off00012cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34