Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8d02345762ba11…

MALICIOUS

PDF

85.3 KB Created: 2021-05-23 20:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 490459e0f547e8a1281309e5bae02d3c SHA-1: 3393559734007e04b4a5e64a88691924febc001f SHA-256: 8d8d02345762ba11e282ebb0f966b827babb344517ce48364212d9341a52856c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by a ML classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that impersonates a 'Bahamas visa application form', likely to trick users into clicking it. The PDF structure itself is also noted as having duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=bahamas+visa+application+form+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427076/normal_5fcd6d90bd6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_606d02ac3cf73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481289/normal_5fe1169f9f0bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6014e8159aecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_5fe1459917f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_606417c60703c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_603e82b16ddf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5fcc66f9e4efa.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/gurenofo.pdfIn PDF document text
    • https://vitojeji.weebly.com/uploads/1/3/1/4/131453493/a04c1c9e9aa118.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/rigedimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5fde02e2567c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_601209e5d4734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_603d7b58efec4.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/ligep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5feeff904e713.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/rizezobabub/28464659246.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/what_is_r_in_ideal_gas_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/16651730672.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 5176 bytes
SHA-256: 6f68b3a29b5d6f506f0d8e86bd43f60c42fc4d2f9a56ce4b02246a88937850e8
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 11124 bytes
SHA-256: dbb421a34fc7522e88f3c0afecc7aac52725ac3649eebec6d2967b8126dfb52e
font_02_sfnt_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3
font_03_sfnt_off00013973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13973 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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