Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3f1805d9db57a4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-28 11:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 75e04fa8345c5cf96c75610e574e428e SHA-1: 278ffd6b28fd7192112d94523d2aa4eae900f56c SHA-256: ef3f1805d9db57a467ac85431b041421415458000255399017f92a4eb43ca9a7
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to 'Amelie sheet music pdf free', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://yafferge.ru/award?keyword=amelie+sheet+music+pdf+free In PDF document text
    • https://cdn.sqhk.co/narulaloro/TzQSb3T/61734714861.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/demibawurujejan.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/UWjqYia/3656040530.pdfIn PDF document text
    • https://cdn.sqhk.co/biserodafed/Jajf0QE/11745012821.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_use_mini_keurig_machine.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/m-audio_oxygen_49_3rd_gen_power_supply.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/beautiful_disaster_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/eaghYjj/spellbinders_grand_calibur_die_cutting_machine.pdfIn PDF document text
    • http://tulutita.sportsontheweb.net/tomb_of_annihilation_the_eye.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/gasexijevamodek.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/cyhc2AP/97469138406.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/apollo_munich_health_insurance_policy_details.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/8Dmt0uv/tadifaxanebofere.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/hbkUkje/rupipusekupevoli.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/jjttdhc/muwogidiwela.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/689061049.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/VIhgrzd/easy_screen_recorder_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/dphbR4v/pesivagafikaj.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/96544172839.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/adding_and_subtracting_fractions_with_unlike_denominators_calculator.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/dozer_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/g0bJja0/performing_arts_academy_of_virginia_beach.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekusisit.atwebpages.com/manual_bambuterapia.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/domabutavogenafuxan.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5172 bytes
SHA-256: 55c22096d7914734bf0176ef007a044a634ae565a097b856635055d93c8d811d
font_01_sfnt_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 12100 bytes
SHA-256: 8cc507c90a382bbe1a9146458d1ede232b87d93d4bb7b6255ad7e47f8087f15f