Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d2c905ef01d5a1…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 08:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fbc841bbb02b97fc659eeda442d64a4f SHA-1: c3af5c7b06e2a1311b90700eb989050976f14417 SHA-256: 27d2c905ef01d5a16c3169a7c9fac638c15c2202f5efc563667349a0a8d554c5
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The presence of embedded URLs and the PDF structure suggest an attempt to exploit users through social engineering, 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://jottigo.ru/wix?keyword=joe+josts+instagram PDF link annotation
    • https://cdn.sqhk.co/kelifevaz/USfieia/detos.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/s9ghjg7/central_park_management_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5ff3ca1eb86a4.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/IaiamZ6/59678003659.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hfg7ggm/mamiwozomilev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_600df45ff3450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_602eab9ad67f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_6011a804d4e30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5ffa4005f1daf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_60110b9a3b0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601732f60c38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475208/normal_5fdc721b4c1ee.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/tidigudetefumof/91748240063.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/45500406522.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/gasoline_material_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/doorbell_wav_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/balkar_ankhila_kut_khaenga_drivera_song.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/sivifegabusaxivonagal.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_off0000e45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45A 5040 bytes
SHA-256: 8fbb0f94a9fee28f2d4a19b3e7b2dc8ada4ce1befa6e0258a26ce90cedb499c8
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 10988 bytes
SHA-256: b3ed7b4a1735c18e42e7a520a832d1b613ecef19f025339cffe1f27f5a056653

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