Malicious PDF — malware analysis report

Static analysis result for SHA-256 94644cc43c5a360a…

MALICIOUS

PDF

84.0 KB Created: 2021-03-16 16:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cc0fe1afec7ce5cc24817f0560bb616d SHA-1: ebd059da407f26ec955d01bd0aabe95e0cc27147 SHA-256: 94644cc43c5a360a6f43f60c2dfdecb118458448366fb2e482d87b44c8f0b80d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9992

Heuristics 5

  • 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 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://nipisod.ru/wix?keyword=ffa+sae+projects PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fcf40520e4de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5feb94017111f.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/dd57c6f8bfc799d.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/71160523211.pdfIn PDF document text
    • http://dugules.iblogger.org/royal_life_saving_australia_national_drowning_report.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/kakewunudero-govodabi.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/pidinomipawoxufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501204/normal_6006b1578fc93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464315/normal_5fcbd16b1a1f4.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/357cb0.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/gisawixibigepufurizin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewawisu.onlinewebshop.net/44171271378.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_2e912189d094492b9cadac333771737c.pdf?index=trueIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/10448138554.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_c15970a4afe64a2fba0732702ca89ecc.pdf?index=trueIn PDF document text
    • http://sopigovo.rf.gd/la_casa_de_los_espiritus.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_b58de3bd0f73496c90219814a491dd64.pdf?index=trueIn PDF document text
    • http://mabazekow.epizy.com/38108092618.pdfIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_86cf11a397224d8fa3e5af81799d8bb0.pdf?index=trueIn PDF document text
    • http://jifimurosesapu.atwebpages.com/rapaxiguti.pdfIn PDF document text
    • http://bebirugiv.rf.gd/71888405767.pdfIn PDF document text
    • http://mepoketefetur.rf.gd/zarawevopowunubutoxam.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/wagulepodepagasug.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 5008 bytes
SHA-256: 9699a0c22857f0eb129f13a096e6eeb06b43c8778e789c798a345d9918d842a2
font_01_sfnt_off00010687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10687 11176 bytes
SHA-256: 95ab042ceb45a39d89f2b0497ea3bc3f270b51b24fb54a5765850e3cad6ba094
font_02_sfnt_off00012c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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