Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b94ba75bd63325…

MALICIOUS

PDF

110.7 KB Created: 2021-05-30 05:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e372c3814c7ff8b9c7d3012e602fb09 SHA-1: 863a1fabe1bcf79e8dbdf429b1564aed1c7b2ada SHA-256: 18b94ba75bd63325500829b1036425b9e5bae9c577be246ea24f0d124e566768
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and one specific malicious URL (soxebez.ru) that is likely used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/123?utm_term=latitude+5300+datasheet PDF link annotation
    • https://xunipemadigorof.weebly.com/uploads/1/3/0/8/130813553/24288b246a.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/ludegaditunekak_gumigokireg_luxezodupitovov_manup.pdfIn PDF document text
    • https://koxufujemugipad.weebly.com/uploads/1/3/0/7/130739729/zibiputiwedaforikuma.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/bibex.pdfIn PDF document text
    • https://zodijezuworid.weebly.com/uploads/1/3/1/4/131483265/vojilekukaxobe-ruzar.pdfIn PDF document text
    • https://tedejewudokas.weebly.com/uploads/1/3/1/0/131070167/vumalanosaguwu.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/fumes_zawos_zegapuzig.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/dajuwiwogukugupow.pdfIn PDF document text
    • https://xixotileko.weebly.com/uploads/1/3/4/0/134018517/fajamivinugisibexuma.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/6633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/565ff6f3-7ed3-4f5d-b9f3-1ed5a2201e6c/how_much_water_to_put_in_avent_microwave_sterilizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab64d00-60e2-4be3-94b7-4d5e4df2d824/13062494750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303c6530-e528-4b52-b6e7-00f38d2594a4/98211816890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f9b1c9-4176-4248-bb72-f277dc32203a/what_is_a_dystopian_novel_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b67b296-920f-4b3b-a669-72fa8d91aad7/complete_ground_state_electron_configuration_for_phosphorus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f301de-7efd-48bd-b877-e18f4e63d85c/how_to_set_up_a_charter_remote_to_a_sanyo_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375be9f5-76c7-4c8a-a91a-56774ef855e1/scoring_likert_5_point_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3922644b-1221-46ec-a497-f2cec91f8ee3/83614049789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283be6d4-9d7f-4144-b57a-716c05935ccc/nabodoxifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4892791-e007-4b32-a433-751097405b64/when_does_warcraft_2_come_out_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9381ad0-a8b0-4117-b80f-190b562b638c/el_llano_en_llamas_cuento_analisis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001450f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450F 5156 bytes
SHA-256: 95bfa8bb2034065ac4a3e5f5f594f6efb917442e04a9ef86988b0749432fe26e
font_01_sfnt_off0001569d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569D 12364 bytes
SHA-256: 800e3fbfd94dfe7a52d3931af246d1614dfaed95a8c488a5241f13fa797a4955
font_02_sfnt_off000180c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180C8 16256 bytes
SHA-256: 7a9e2d59f3861041734050912dcf20811f16667f9a2665f429939a7311546236
font_03_sfnt_off00019671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19671 6500 bytes
SHA-256: 1f1a1a6a6414c0131aea2c0d9392c29bca619a205bef9eafdfd5d84826ad3182

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