Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6e11da43ea5435…

MALICIOUS

PDF

81.1 KB Created: 2021-05-25 11:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fb5a4c0ae58ab5cd6c2bb111cd5cc55 SHA-1: 1b37175f5e248a312a4e26c32dc0b35f24751ef6 SHA-256: df6e11da43ea5435c8edc23a25d46366b10fee08babd5b4ff1e36e035abd0617
196 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a password-protected-archive lure. 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 0.9997

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/strik?utm_term=how+to+do+a+hard+reset+on+a+motorola+phone PDF link annotation
    • https://nosilagime.weebly.com/uploads/1/3/4/6/134613039/4462813.pdfIn PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/ridofemedaj_xefasozojojolim_dodukik_revurizuzo.pdfIn PDF document text
    • https://kejopawilut.weebly.com/uploads/1/3/4/7/134709951/navurep_nalovifuwik_vekumoson.pdfIn PDF document text
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/43e2164c7f25.pdfIn PDF document text
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/f80fdf.pdfIn PDF document text
    • https://nosikofu.weebly.com/uploads/1/3/4/7/134724553/17e07f3fd.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/tokolakuxodoli_vosebugiwa_zarefekotolimis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_6057fbb9cbd31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5fe8fd06db422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fec03458d9cb.pdfIn PDF document text
    • https://sefelitajirowa.weebly.com/uploads/1/3/0/9/130969992/peluzomafog-jemeteniwud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/89fbb16a-51c2-4e18-9f7a-f12f1c473a38/detox_diet_recipes_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/nupukunu.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/forecast_analysis_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/sapewatudovekanulijiname.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5f0987-dd01-4612-b3c4-31fe1f5ebafd/grammaire_essentiel_du_franais_b2.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/36498216586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3916b78-16a6-40e6-a4f0-a9efb9ba2064/77446554589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e164d0-ee68-45ee-b768-cf35c40a0514/dejipitufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c15b95d-b032-4684-b157-089ba1d9e679/standing_yoga_poses_with_names_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/car_and_bike_games_apk.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_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 5252 bytes
SHA-256: 2f0dd595805db8dd0a7183d6784aff378b6107e73274913e8273686b2c76f34f
font_01_sfnt_off000105b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B2 18916 bytes
SHA-256: f50a2388c6c3df755f4537d8bbe2b84cbb9efeb62af8225a9529a4a5dad89bc3

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