Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aee7c7bf00c66d8…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 14:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 73fc7e46c80f9f930545b3859c222a47 SHA-1: a25f3ea5ed375c1927b61be9ae58e6eff864fad9 SHA-256: 1aee7c7bf00c66d8bf5f132209ed46f4a8fe3f6c276e2e9be743b4ca9550a6cd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 or phishing operation. The presence of these links points to an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=android+canvas+draw+empty+circle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479932/normal_6006afd1f0c01.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/59693365898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6015b49980b3a.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/dikuwexedikobekufuxor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_60025841b72f3.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/xaforejuriv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5ffbfe380b464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_6027ec2cd284f.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://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_1851ccf3f9824d089792b9888b621028.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_a62e44632e064bb68698a1252b36c784.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_2af7ef1553f846fb99b0fd1dea138db0.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_2b523bf339584fb2972aca43a68d7a66.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_a68df88d5df040208a001a40048fcfa7.pdf?index=trueIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_dea4e656aecb4e23952527b5b9db1289.pdf?index=trueIn PDF document text
    • http://sesukunijekoti.epizy.com/bejobesi.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_911454eb4c974cab82719b6dce63bff8.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_be9b7c6bd8654001abb41f2fcc944dc0.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_b76367a6a74a4ba1aad007ca98908dba.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_f7787c5172cf4009ba056207bebebe99.pdf?index=trueIn PDF document text
    • http://warodisomadux.epizy.com/75791751558.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_7188be9dce4d48958169cec434a6f83c.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_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 5248 bytes
SHA-256: c9ed232a2a81f05d112df515a86b1dcf0e289e10ae17b852b1b31c26f46ae9c4
font_01_sfnt_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 10912 bytes
SHA-256: 941cfcc1d740dff011d4df68d9f9848e453d89a4abe8c189311b2d9a1bb526c8
font_02_sfnt_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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