Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80e8d23e32da38a…

MALICIOUS

PDF

90.9 KB Created: 2021-05-19 13:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ae50da060ec124acfa76f6ae74105c76 SHA-1: 3f01128fb21711fad8dcbd87a5eab7bb46a75a76 SHA-256: e80e8d23e32da38a0b9ba928d95e53638b8d278f10878df91d55e00a64fa413f
156 Risk Score

Malware Insights

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

The 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 pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The embedded URL and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=how+to+increase+speed+on+segway+ninebot PDF link annotation
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/6928816.pdfIn PDF document text
    • https://zobaretax.weebly.com/uploads/1/3/1/4/131482953/882340.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/dinivirewonejexujevu.pdfIn PDF document text
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/9882e6a889832.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/4880055.pdfIn PDF document text
    • https://zofizefeva.weebly.com/uploads/1/3/1/6/131636954/593f89595c.pdfIn PDF document text
    • https://fixupikavejezop.weebly.com/uploads/1/3/4/3/134392539/15e53eb141ae5ef.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/sojifozexolabedave.pdfIn PDF document text
    • https://koligopore.weebly.com/uploads/1/3/4/6/134605833/kagejipomol.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/8133743.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/zonivesebim-xivibujowemipuv-wapazupelug-bukibufelof.pdfIn PDF document text
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/pexijulelet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/memu_android_emulator_system_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3bedb7-8bd0-48dc-ba22-1ee99a4ba314/wolf_gas_oven_not_heating_up.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/43035184890.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/format_factory_exe_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/alberta_blue_cross_dental_fee_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/95484102931.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/31062987666.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/39711856011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4a8214-9c78-4f8e-b2a1-50670fd101cc/what_qualifications_do_you_need_to_be_a_caregiver.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/isopropyl_alcohol_msds_sheets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 5504 bytes
SHA-256: 80215074b1b7f785788401e10ca81ab35cf6edd1695f059472ef94a6640416e5
font_01_sfnt_off000136ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AD 11616 bytes
SHA-256: d1b81cd370f2c757c0b4d84567ef44dda3e80e0db3365fd94db5ef55d44ab9d5

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