Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab59701289808c2…

MALICIOUS

PDF

68.3 KB Created: 2021-03-04 16:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 70c9d64348580962f04cfb47b435a8ab SHA-1: 23e075201a978e3a856a62252986f197535e4226 SHA-256: aab59701289808c20f9f8bd65d12223fb4a5d19b64e8fc7582f9a6df0d067ee5
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://botokaw.ru/123?utm_term=what+is+a+kabar+fighting+knife', is flagged as unknown reputation, suggesting a potential phishing or malicious redirection attempt. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDF exploitation, contributing to the overall risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=what+is+a+kabar+fighting+knife PDF link annotation
    • http://lezigovedavide.getenjoyment.net/the_brief_wondrous_life_of_oscar_wao_chapter_6_summary.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/4135233543.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/when_dimple_met_rishi_show.pdfIn PDF document text
    • http://jifoxife.66ghz.com/64658266512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_3511f285fc9d4b979372dd0b950ba14a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/47650396770.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/sad_images_for_whatsapp_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/luzudezutiluxofawifide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd38cdf-5db4-496c-950d-5c4f89b43fa1/samsung_galaxy_s9_plus_case_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/056277d2-1ec8-42d2-8168-0c53f18996fe/why_isnt_my_samsung_refrigerator_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a831080-1a97-4a9e-9b8f-062fc1f3780e/56088943094.pdfIn PDF document text
    • http://danesavib.epizy.com/25060870523.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_b7351cb6113a443981c8b03ba728c162.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ffafaec-44d7-457a-9a96-a9553b3b252d/kauai_hiking_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/interview_format_paper_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/49034913205.pdfIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_8350e463f06f49939f930e357b147d58.pdf?index=trueIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_bee790d1d9b44f0abca3e7a1d8c900c7.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_dcea7c55070c49ae930eee18e7b75ef4.pdf?index=trueIn 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_off0000ce09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE09 5216 bytes
SHA-256: daab51c3068009722b11f6ccd5d2cea8ebe63dfa745b6b3a81c8949b13f03d9c
font_01_sfnt_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 10608 bytes
SHA-256: 1e4f142cd523ee4f8b74b673ccf1a10f0396b0df43bdec761a4e2c0329933eee

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