Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8c8d5b9d374a04…

MALICIOUS

PDF

82.4 KB Created: 2021-04-06 05:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 807eaf72b220936ac4728f30f433c5a5 SHA-1: 5f999e3725bccdd1c4fe85815a1eeb72f6d15dba SHA-256: ff8c8d5b9d374a0454d70eb8b2071340d254f6b7d89544f42c90f8d6d862e76a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs, with one specifically appearing as a search result for 'wine fridge making popping noise', suggesting a lure to a malicious site. The PDF structure and embedded content are consistent with phishing attempts designed to redirect users to external, potentially harmful, websites.

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://kuzutuzo.ru/strik?utm_term=wine+fridge+making+popping+noise PDF link annotation
    • http://avto-trokot.xyz/father_and_son_fishing_silhouette_tattoo4gkq7.pdfIn PDF document text
    • http://insitemonitoring.com/versatile_solvent_importanceyrvnc.pdfIn PDF document text
    • http://xtrading.buzz/flowers_for_algernon_audiobook_part_2qe8jq.pdfIn PDF document text
    • http://nesobaka9.xyz/55620010964nar4u.pdfIn PDF document text
    • http://fujubipe.22web.org/barron_s_asvab_book.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
    • https://s3.amazonaws.com/dinisemowoge/lender_unable_to_pull_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22366133-e2ab-44e6-a09f-bfa1145d31ea/liana_lowenstein_free_ebook.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_dc78681402014b47b38ebc5e265e311d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d8fffe-f699-42a3-b453-323c113edca6/budisi.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_45599daf49844d3dbc2603354616e314.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7995187-d603-4ae5-bd27-cd3101beb40a/20307403182.pdfIn PDF document text
    • http://fomajunelafid.epizy.com/68971448325.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_74964a08055741abbb08b6c4809f1fa1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/oracle_autonomous_database.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf72f3ac-9a9f-4b50-85f0-052632343cc5/dowoforuzizilineros.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/mozilla_firefox_48.0_2_32_bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79307ab7-b0cf-4dde-8f20-c03f17ac6b5d/99422657329.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_b5f2d30a108444279d9e40dc5bc7bd60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/mobile_movies._com_2018.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_6a4c9ed2fdb84bdab3dadab548cb6b4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/android_bypass_proxy_for_ip_address.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/calendario_2019_octubre_para_imprimir.pdfIn PDF document text
    • http://zezogoniv.epizy.com/binunuv.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_5b6a7a4eb5ac42ea9872a9855e1b79eb.pdf?index=trueIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_c3ae6803213645bb8988afe1b27aa388.pdf?index=trueIn PDF document text
    • http://sajonagot.rf.gd/le_journal_el_watan_algerie.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_b59e307a2ab54e94a9668860fa3c06e5.pdf?index=trueIn 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_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5116 bytes
SHA-256: f90b8a19095f4833af8e2ef4ea5d6976b6dde4a784d2de8fa191b736c1bb12cb
font_01_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 10880 bytes
SHA-256: e9b30d5d0139ac18ed14846f48a3717aadf4c02315b24e391d2ce0b964fa7826
font_02_sfnt_off00012db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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