Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fada0365436756…

MALICIOUS

PDF

90.2 KB Created: 2021-04-15 06:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 488e97077f07da89aed0faad48535ea5 SHA-1: 4bf8f2112187606c27e8532c0eac641ac5bdf213 SHA-256: c0fada03654367567a13ba508766bcf5b0dd52acf9fa99fcb9ea5fc081bca34d
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or phishing lure, indicated by the presence of numerous external links, many hosted on disposable domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the document's structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/strik?utm_term=rosencrantz+and+guildenstern+are+dead+player+quotes PDF link annotation
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/jalarefida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_605255265c0be.pdfIn PDF document text
    • http://mgacessoria.online/15647698587w95vw.pdfIn PDF document text
    • http://prognoz-football.club/data_mining_techniques_for_association_clustering_and_classificationd9ib9.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/wadilog.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/dd2f2b8.pdfIn PDF document text
    • https://mukafakurud.weebly.com/uploads/1/3/4/3/134315218/2751715.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/human_resource_management_notes_bcomkav4l.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/Atoihjb/47319547000.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/vHyZiaQ/maps_for_minecraft_pe_apk_ios.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/pezonufosuki_mumebuwuweda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fe898525995b.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/6504288.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/1305559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fd12a5b120b0.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/49730682113lstu8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_60635a43a2c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_6013c25c59a3c.pdfIn PDF document text
    • http://wonder-ita.fun/what_is_data_science_workhoqvv.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/gggmHid/abb_10_kw_inverter_datasheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30fe55a9-f0c7-4aec-9bf5-b9d2225d99a8.filesusr.com/ugd/c4a51e_95214fda38574f00b0a3812579f3db97.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_b04250f62df4429395910f8568fdaee3.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_292c47547c8b4e35bec46c18aba276f4.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_13dd1e03cc8143a8b7fcd921aad94ead.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_2d5ccc91e26f4ab29f946b57f597f168.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 5524 bytes
SHA-256: 76ece8af9ed9fc97c9a2edeaf5f56bf13e7f19b95b1af1b9b752c02763354226
font_01_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 11436 bytes
SHA-256: 6e21b94e03f34268655950503454e7b08603738e45b601b0301182d3d428ef1b
font_02_sfnt_off00014544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14544 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449