Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ad5f57cfa07119…

MALICIOUS

PDF

79.4 KB Created: 2021-04-03 00:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e60f3486118b4fd9c43162cb53c0e792 SHA-1: 09b2685539428c3a386170ad560833faf0c398f6 SHA-256: c5ad5f57cfa0711936f7cc678ba4266ed357043309972534374e1c4b4662bba9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a harmful site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=bunker+hill+wireless+security+alert+system+harbor+freight PDF link annotation
    • http://janafan.scienceontheweb.net/12685721977.pdfIn PDF document text
    • http://francobusiness.com/nokenedxd6g.pdfIn PDF document text
    • http://fenofojerafama.22web.org/tapotilezajatewagimus.pdfIn PDF document text
    • http://vizit.store/dikuxuletej4yg8j.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/how_to_cancel_enercare_hot_water_tank_rental.pdfIn PDF document text
    • http://goodsfor.life/sewasapedevovababafi1fnf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lupebesu/front_squat_form_alan_thrall.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/21614861211.pdfIn PDF document text
    • http://nunitew.rf.gd/medicamentos_antihistamnicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d84abb-8baa-4dab-a5df-becba59eac1e/how_to_fix_acer_laptop_screen_flickering.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/vesiwewivitipaxebobagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee166d32-f9ec-4d2d-9215-b6e3944a9e20/1211683609.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_4d8f3c5dabdb4a409cbf2559d61d1479.pdf?index=trueIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_3f4839681dbd4e14b19cd4f9a41a78df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojenozap/fevizivoralulojobup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fec0c1-8cb4-4c04-9cf3-50b199cfca6a/which_keurig_has_the_largest_water_reservoir.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_405e3eaf0d1043f0aad776e26ba5c85b.pdf?index=trueIn 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_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 5740 bytes
SHA-256: 50533b9e0d6b8656444fe4d4621749b796fd109b61945b26d4e2def6965399b1
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 10428 bytes
SHA-256: b7a329ad237e33883a1b7ea2b812d002633d329fb5deee5bb39acaba2fee8f04

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