Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1abe64fbbd8e97…

MALICIOUS

PDF

78.7 KB Created: 2021-03-11 12:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 041ecb496aed56ed43b62aba29a20362 SHA-1: 284e80e58e4aa8b1a0c8a82a9045f44880dbaf76 SHA-256: 3c1abe64fbbd8e97143d4e5824d2d52680992a42765fc14a7fda3317fe6d4039
244 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious websites, masquerading as a free download for vegan recipes. The primary malicious URL identified is 'https://crophysi.ru/award?keyword=1000+vegan+recipes+pdf+download'. The presence of numerous links and the ML classifier's high confidence score indicate a deliberate phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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 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.
  • 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://crophysi.ru/award?keyword=1000+vegan+recipes+pdf+download In PDF document text
    • https://takaweso.weebly.com/uploads/1/3/2/3/132302848/6908284.pdfIn PDF document text
    • http://zuvixomajav.22web.org/how_to_make_a_dd_campaign_setting.pdfIn PDF document text
    • http://tinonijo.iblogger.org/24708194718.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/kirov_reporting_red_alert_25v5p6.pdfIn PDF document text
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/tuzotuzo_vobudeti.pdfIn PDF document text
    • http://persequen.com/bescor_mp-101_modificationhx2pz.pdfIn PDF document text
    • https://zokaguwozan.weebly.com/uploads/1/3/0/7/130738936/ade07.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/1305596.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/musefuralagix-mizojo-nozumaxuzatezer-webuworud.pdfIn PDF document text
    • http://boldly-grow.com/how_to_reset_pldt_router_admin_passwordbewwc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_42c6473c51e44e01b2ba8b0dcf49a5f7.pdf?index=trueIn PDF document text
    • http://panulanupujudun.epizy.com/python_list_files_in_folder_recursively.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_4619bcd9b6af40f4aa9146bf572dd8a5.pdf?index=trueIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_ff656779091143e1a205fd60edde8823.pdf?index=trueIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_75a8a6f40e8c4fdca40250e69373b55f.pdf?index=trueIn PDF document text
    • http://tuwidapaj.epizy.com/guxomafovap.pdfIn PDF document text
    • http://bibarixe.epizy.com/jawedifuloguvuri.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_0f2485e41e4c43c9acd702970c070d79.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_eb4d17019586414cb312f5e9fe5a5904.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_a28820a7c62b412a83f34fef1569b84c.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_93044081cee34413862c4dfc66ff0a4f.pdf?index=trueIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_f7b61b3c39d64e6ca3dacde223eadf08.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_57021fe3a21c4d6bb7affd6707f1acaa.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_e6acdc75b8194a1ca51f4e6f8fb1eef8.pdf?index=trueIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_d193ce9cae844e908218ae88af2551e8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 5576 bytes
SHA-256: bb7916e1038306cbc8a237d56711c33cee337d65cb81e0298fc65591d67d20fd
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10240 bytes
SHA-256: 50b303c7696c71219267ae38a1450c58bec8982a8bebcdfe3cba813b38d8500d