Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a124e76ea1c4e4…

MALICIOUS

PDF

78.3 KB Created: 2021-04-01 08:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c25a86a2b0eb4a800ef8ca5dcec1f80 SHA-1: 5206c2ba842ca7a915f81c3204ad8c3c182ff514 SHA-256: 01a124e76ea1c4e483c1e574ffc40551f69652072bc00527616cd91543e84728
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/123?utm_term=jasper+reports+studio+community PDF link annotation
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/detugiji.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/xoginuzexa_jaxij.pdfIn PDF document text
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/86f61e2b7.pdfIn PDF document text
    • https://wanesoxe.weebly.com/uploads/1/3/4/3/134369563/1103334.pdfIn PDF document text
    • https://dafalozurevibi.weebly.com/uploads/1/3/4/3/134308304/09ba52c17d5d.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/fenuwo.pdfIn PDF document text
    • http://zasijeg.iblogger.org/zabanisaxovajejizidojit.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://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_8ba437cf329d4434bd71a7a53b93f65d.pdf?index=trueIn PDF document text
    • http://najexenij.onlinewebshop.net/calendrier_vacances_scolaires_2020_et_2020.pdfIn PDF document text
    • http://dalonirutufitad.rf.gd/2012_international_maxxforce_oil_capacity.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_b69f705977bb4afd8cfb4623fa429574.pdf?index=trueIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_43ffc5ecdae24d948a433f50b5b08c29.pdf?index=trueIn PDF document text
    • http://gekobilewubu.rf.gd/xugexabixupojokivonotaw.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_b15e92c05ea541e3aee847f66f81c8fd.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_82ad58ce60444892b4cb4d7e037431a4.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_03a78c61c9214e359cdb71865ac33580.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_82887e25bedc42aa87f13717c9463039.pdf?index=trueIn PDF document text
    • http://lifotag.rf.gd/darejatufefipomuzibi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 5160 bytes
SHA-256: 6c5e46417502ac0710091ad8375583808bbc2166eb7de6530efef090b8764f1b
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 10872 bytes
SHA-256: 791f65e9051653ab5cc10dde2d811bd8f493dfda54788fe078cfac97b00adfc4
font_02_sfnt_off00011dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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