Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a15d8a537e24bfb…

MALICIOUS

PDF

109.9 KB Created: 2021-04-01 12:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e6468949a48830c4c522bc58fdfa3753 SHA-1: 5bcfeb88fc7651d85d6a4b40794828de91d4768a SHA-256: 2a15d8a537e24bfb0c96b1324e84f17b47731ce4a034e488e1b237e253a2a332
186 Risk Score

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. 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 0.9993

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.
  • 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://maypoin.ru/award?keyword=awakening+the+heroes+within+pdf+free+download PDF link annotation
    • http://sayseedokg.com/alvida_mahe_ramzan_whatsapp_status_videoju3o6.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/the_practice_of_creative_writing_a_guide_for_students.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/44477053860.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/8225057.pdfIn PDF document text
    • http://extraevents.ru/are_burrito_bowls_healthier_than_burritos6tb66.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/6309332.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/vepubowowevitumob.pdfIn PDF document text
    • http://runmasten.online/82576471481f9q0r.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/6829397.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/a0e87492776.pdfIn PDF document text
    • http://kzrovk.xyz/95457919756tw15y.pdfIn PDF document text
    • http://phillipen.online/kisibezxoes.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/2feb8da0-6748-4aee-8c58-a8f1e7456cd0/6005890516.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/using_commas_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c246f9c-210f-4784-be62-96b604d23b5a/fumugagepajasiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5a8c2a-acb9-4823-9dea-cb74271dcf7e/31211623279.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/41221846673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ada7b1a-78b7-4157-b8e8-4e2ef39eca62/play_store_updates_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f33839-eb51-4873-a8e6-db4b304d3152/74035718039.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/gixuwisogot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e9cb0d-578b-4180-b3c5-e319889f3088/31763405266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070a8b97-6d95-425d-9ff1-7e14b2c36575/fronius_inverter_error_code_306.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/37026599407.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_off00015963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15963 5448 bytes
SHA-256: 94f9bcb457615e0472556a4d622add5fb025ab47c5260ab37c8e382bac2ea51f
font_01_sfnt_off00016c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C00 12192 bytes
SHA-256: ecb542d199613fdd5b387bbdf50cf27cb7eb80a45c336040fbeb9e29001ae4c8
font_02_sfnt_off00019459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19459 16100 bytes
SHA-256: 4a3d97cb0f01b67db0f2c0c67b38c82a67e4beafd846d3a18a1ca53b20acedf2