Malicious PDF — malware analysis report

Static analysis result for SHA-256 e146bf34a20ac413…

MALICIOUS

PDF

117.3 KB Created: 2020-10-09 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a296b7c9854f532e7097a7ea298d1ee SHA-1: e2f1e97a6f9d52115ba738451bfb5043cc280b6c SHA-256: e146bf34a20ac41377c4018db316bfc6fa8971da5cb96ca08b345ad2e09537cb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous other external PDF links suggest a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=allan+kardec+oraciones+escogidas+pdf In PDF document text
    • http://suwojol.mndeathcollaborative.com/uploads/1/3/1/4/131453741/e90d9f.pdfIn PDF document text
    • http://bofagiwe.goodspeedwatches.com/uploads/1/3/0/8/130814328/ed8586a1.pdfIn PDF document text
    • http://sumoba.milanchurch.com/uploads/1/3/2/7/132712127/bepuzuguziwek_roxuvir_falugozip_vozasapap.pdfIn PDF document text
    • http://files.innatelyhealed.com/uploads/1/3/1/3/131381021/jaduzod.pdfIn PDF document text
    • http://files.johnsonwriter.com/uploads/1/3/1/8/131871705/wowig-rabusisajela-dutejisuzanuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2940d4cf-6430-4e52-8165-9b26d5a76948/13583794309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfa7b22-4947-4b87-af51-3fe5b342dfd7/xazekejememuzakusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02541211-00fb-4960-961a-52113739d4d1/migurovinunofak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21f86ac-97b5-4784-823f-dd5d03b174b3/72716119653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7810/6270/files/codium_fragile_ssp._tomentosoides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/zuxepizefemadipawotolome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bc89fa-e124-44d4-b0ff-e9b9e90d7612/pajonuxijabobanet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b8098b-6114-4375-a988-d2e2a85bb34a/boselebeli.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_off00018f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F3A 5376 bytes
SHA-256: 9da589d68324502ad312a1a328d00e7e5c0a0d2c44e66952fca53492e0199c91
font_01_sfnt_off0001a198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A198 11248 bytes
SHA-256: 8db1a2fe60bc98dc44df40083536673567576239b44ab4790ad1ca178573aefd

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