Malicious PDF — malware analysis report

Static analysis result for SHA-256 a065a717519da44e…

MALICIOUS

PDF

77.1 KB Created: 2021-06-05 18:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1b2868fcd25fe406fb5eac4d4f6c3248 SHA-1: 5d552650830a58685c71b93a9aa7a8e50aed58ab SHA-256: a065a717519da44ee989fc825f85f87ca8f9579d5a70e795487ef8d443f22ae8
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. One prominent URL, 'https://pistant.ru/pbw?utm_term=beat+saber+install+custom+songs+quest', appears to be a lure for downloading content. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/pbw?utm_term=beat+saber+install+custom+songs+quest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496607/normal_601b50850cd73.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4422638/normal_60b4f86b4e5cf.pdfIn PDF document text
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/cbc7ab10763ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fe61e37d257f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420237/normal_5fca0d787a57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_60247dd53267b.pdfIn PDF document text
    • https://kanolapegagidil.weebly.com/uploads/1/3/4/3/134339460/5e63a5cf8315.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/6e6492c7-8e57-456d-888e-5e3c14294983/28354045198.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/w/file/fetch/144538095/56464664737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a73e24-3017-419c-a1d6-c360e5db59a3/73594991735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685574bf-7ec5-4ac0-aa98-b6dcdc929b1f/spanish_dictionary_appointment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facf9139-7a6b-42a1-b322-d0df92086d90/65755014679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40b42e1-2824-499a-804d-9535fdcdbfda/99576094559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b91824-8981-45ae-a607-9933d4100f74/sadie_adler_red_dead_redemption_2_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14fa6919-cba5-4c44-bcbd-70514972ae96/hillsborough_county_fl_school_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c646ac2a-e3cc-42ca-ad47-5ea01d9d075b/how_to_reset_an_old_ipod_touch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe1ed1c-2bd7-4946-b0de-4081028b6c33/wilikakivowetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebef1a52-f7be-4aad-9f77-164461ff63c5/physical_chemistry_for_the_biosciences_chang.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144564489/five_nights_at_freddys_2_download_free_full_version_android.pdfIn PDF document text
    • http://dewubuk.pbworks.com/f/midodametak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7ef5d8-4c04-48c1-8a6e-5f24c849c836/7-2_similar_polygons_worksheet_answers.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_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 5432 bytes
SHA-256: a6c5e0740ed3934123769c377287c1bd4f1294f5be145322b221fd5e223f8991
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 11416 bytes
SHA-256: 5162756b47e7ff95157d6832478403727c6bc2f38b4329b55c3153acb6aaa87d

Open this report in the interactive analyzer, or submit your own file for analysis.