Malicious PDF — malware analysis report

Static analysis result for SHA-256 e025d849414c122e…

MALICIOUS

PDF

45.7 KB Created: 2020-11-05 22:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2913c764d1bc4695a8f7e79302d51203 SHA-1: 6fdf33ab8a0a0adeb0c03a673f74454436e7ec37 SHA-256: e025d849414c122ef2ce80d1362014f6e9463b92a655fbc7e34a5d839afc49e9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with a prominent one pointing to 'trafffi.ru' and a keyword related to 'American Express confirm card'. This suggests a phishing attempt to trick users into visiting malicious sites. The presence of multiple PDF links, including a 'link farm' heuristic, further supports this. No scripts were extracted, but the document structure and embedded URLs indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/strik?keyword=american+express+confirm+card+1280 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8d2ccb2dc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fa10c193792a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87103e24940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5f97847931ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f907540bbd6b.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fa08b489ddb6.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/sobibedowi_xozefegerozeti.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/xefejevife/57667227497.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/84512925683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e57649-c09b-4da2-920f-4ce9538cacfd/lunajopigomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347c7060-5658-47ae-8899-78356627231d/kajawajovuvumabelokol.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/vofabevoxujoxozomad.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_off0000735c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 5844 bytes
SHA-256: 304f459f34ecbb9eb8a8e798775fb57a90fa486f70b60ad64d5368464a5a6c9e
font_01_sfnt_off00008734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8734 10192 bytes
SHA-256: c9ee20ddbe0eca0713171256f3994bd8a42c0769bc4bc98febf4df273b2bd2c0

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