Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a483cfee698b82…

MALICIOUS

PDF

79.1 KB Created: 2021-03-17 19:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b8f9b259ad4596154642ee39e38f9bf6 SHA-1: adb6fc30a4d69b2c48788b51cefda87b13220ccd SHA-256: d5a483cfee698b822555853fdb5c5ed04ef7bf0f04c9efaa077409fd52506bd1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://xezojetit.ru/award?keyword=bell+bottom+blues+chords+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417986/normal_60418d516e6de.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/uighhvC/81840977417.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/XI1jeij/thoracic_duct_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469105/normal_5ff64e0b1f64d.pdfIn PDF document text
    • http://naxaliref.iblogger.org/lg_front_load_washer_wont_spin_le_code.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/hhedhd3/libro_el_arte_de_la_guerra_wikipedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ff7d420a09b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/zuvomixutupumolubat.pdfIn PDF document text
    • http://mokufapupajenap.epizy.com/fovego.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/nises.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_5b43bf451ea8457e808d07f0bf68b769.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/44256149901.pdfIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_4bfd35d710284fd396c3dbc5ad030e20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/dependency_hell_android.pdfIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_90c13a899bed4b86a43b13c40c701fd9.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_957415cc1ff742d0b8d88c1da89874c1.pdf?index=trueIn PDF document text
    • http://zunebafovako.epizy.com/divider_tabs_to_use_with_sheet_protectors.pdfIn PDF document text
    • http://pogugule.epizy.com/derivation_of_lens_maker_formula_for_convex_lens.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_795a20a6ca24441c939eea35e50a8835.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/cannibal_movies_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/what_is_tcp_and_ip_in_hindi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 5100 bytes
SHA-256: 0ccdc7f332348af473cb0260bd92fe571e670fb08cc0a725a06dbadb4462fce8
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 10864 bytes
SHA-256: 8114ef7d7f773f4ee8ad8e96c9b5a0d99880c9ca9979cc5eaed26e61d5b6f506
font_02_sfnt_off00012102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12102 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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