Malicious PDF — malware analysis report

Static analysis result for SHA-256 038bdba97e1d8588…

MALICIOUS

PDF

87.0 KB Created: 2021-03-14 18:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 058a05b837765e552de9bd4aa2ba5733 SHA-1: 1eacd3bf18e0690a95138f931ef9e0ea285b5235 SHA-256: 038bdba97e1d8588bddea1616621dce60c5ed551ef2fb6dc1228bb8802681aa7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://xajibur.ru/123?utm_term=review+sheet+mask+innisfree+tea+tree PDF link annotation
    • https://cdn.sqhk.co/zulatobi/hdv5haJ/85101522483.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/gejde69/xutixig.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/p2Pjahi/23819709621.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/hYkhg4l/jisibutades.pdfIn PDF document text
    • https://cdn.sqhk.co/lirisakaxam/ejcjjhd/3888779300.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/tVOqyid/noblemen_1896_apk_and_obb_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/ahjAejd/pubinopuxobamezumagu.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/0iiHvZc/kepujupefupuxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/dZxTwjb/75809400965.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/hfjd5cd/gakufiwil.pdfIn PDF document text
    • https://cdn.sqhk.co/doxanusubomo/xeggj5J/ganapelipafutusoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/ibp1ji4/18664758362.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://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_e808a59586424e8cac65e2462e73c05e.pdf?index=trueIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_7cfa8e6aac5c4d7f8bfcb45f1897a96c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/46576823434.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_b998d852f6dd43179ae3be17131aecea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1d5790-c61e-41f7-ad9e-191006a8825c/mechanical_engineering_drawing_symbols_and_their_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ce95b8-4305-45af-b7d4-319b90e5b237/pioneer_deh-x6500bt_bluetooth_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/xikitopumelipizedu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/kafenozewe.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/free_year_end_function_invitation_cards_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/58993662585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0298f40-080e-400c-a90c-09c718b55ad8/hyster_60_forklift_engine_oil_type.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 4876 bytes
SHA-256: 1bb30bd856fc0b97b21869b27674c4382debfda487fe1475eaf420cd923032d8
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11200 bytes
SHA-256: cd590560442cfcb298f69c35e5109ffeac96dbefff7a5ba8dcabc093e2e6752a
font_03_sfnt_off000129f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F1 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_04_sfnt_off00013f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378