Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bef1757b8bf006…

MALICIOUS

PDF

79.3 KB Created: 2021-03-05 12:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a109a387f8ca9367198849639ab332a SHA-1: d94c373ed0378e29eb598ae2c3c016c575c63a31 SHA-256: 60bef1757b8bf0067ee14bb949e7c5e0a284909a71f81ffc09107797801e0f74
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and heuristics point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=innova+3030+how+to+use PDF link annotation
    • http://bitjoms.xyz/49764773959gnu4c.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/zetixereku.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/3d_face_mask_sewing_tutorial.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/why_wont_my_roku_controller_work.pdfIn PDF document text
    • http://canonsburglake.com/rixugorolusozujezenuvewum68bct.pdfIn PDF document text
    • http://organicnu.info/67734531219okyn6.pdfIn PDF document text
    • http://rkconstructionsucks.com/american_funds_simple_ira_transfer_formd880d.pdfIn PDF document text
    • http://bufo.online/pojajevuvul9rsjy.pdfIn PDF document text
    • http://sayseedokg.com/apache_spirit_runnersr7d9h.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/old_yeller_free_download.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/ca3af2b3d7.pdfIn PDF document text
    • http://1xbet-football.fun/zalade89yu.pdfIn PDF document text
    • http://dom-bita.org/lovobavibunobukirara3lqzg.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/how_long_to_study_to_pass_pmp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9919a097-a2b3-49a9-8939-e2ff6c76c287/how_kill_a_watt_works.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/remington_16_inch_electric_chainsaw_sprocket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831d9950-7aa2-419a-b9a5-4857a537d441/best_bp_monitor_for_large_arms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae45d97-e3e3-47bb-8c05-7e863b2cc14f/48353118704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3b3f32-db66-4d55-8161-82987a0250ae/2939710447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c4fa64-1f8d-4aa2-83a0-55cf593ab000/dyson_dc59_hepa_filter_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/342f75b1-a8aa-4b78-807e-ed37a0e23e8c/33880198297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249d37fc-fa4b-4af0-907e-56c6fbc914b6/descartes_first_meditation_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eda4384-4a91-4711-a072-3a378a113454/52072047190.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_off0000fbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 5040 bytes
SHA-256: dfde606ece63b3568d0ca852402548c3b0fee6e6a833779a5b6590c90e49f1dd
font_01_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 10348 bytes
SHA-256: 237d5957e3136f600e29bf62a737f436cf4565c429031a1e69b60c71ef4bec27