Malicious PDF — malware analysis report

Static analysis result for SHA-256 e488678a0b6a597d…

MALICIOUS

PDF

73.7 KB Created: 2021-05-21 14:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0eb0233f491cf48aa259e39bc3084fb7 SHA-1: fa035aa3257591d831959f6bfc570a3bbc1618ff SHA-256: e488678a0b6a597d7e206998c4b7dea25054dda74fcc652ec84c3c6747bd1bce
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'Children's songs sinhala free download mp3', which is likely a lure. The presence of external URIs and a high ML classifier score indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=children%2527s+songs+sinhala+free+download+mp3 PDF link annotation
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/masugopitivide-womisid-salimevek-bakitamenunupo.pdfIn PDF document text
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/3f879e4a199.pdfIn PDF document text
    • https://biluvumilu.weebly.com/uploads/1/3/1/8/131860938/bonival.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_6016c2c4f180b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fcce69865034.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/5077963.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/355553.pdfIn PDF document text
    • https://zepifuvuxetota.weebly.com/uploads/1/3/6/0/136095774/e6fd04.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/tuxenipup/landforms_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68eeaa40-d61e-4c07-bdcc-435754df6b4c/how_to_straighten_scoliosis_with_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/formal_asking_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/tekaturisegusawumugila.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/blends_worksheets_printable_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b55dfc-b4c6-4638-b6f7-1404583c5a3f/yamaha_r6_service_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/what_were_the_major_causes_of_the_renaissance_and_the_reformation.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_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 5652 bytes
SHA-256: 250523cc679aed31613a9107624b447d74d20f21f60b903e16cfa606e5d6467f
font_01_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 10744 bytes
SHA-256: 94fd8f0507b6ce38a0aa237eb16870ddee739ff7aa5c69194e7d7cd21c27651f

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