Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee23b0d02874f3b…

MALICIOUS

PDF

71.4 KB Created: 2021-02-18 10:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 06e2f255a05466de646dbd2b52df431d SHA-1: 9d5bc43afb35f582facbb83af2e343bc554ffb40 SHA-256: 5ee23b0d02874f3b47347763ace5cfb179850ef198399a38fe031d9751aad7eb
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are generated SEO-style links, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/123?utm_term=where+is+my+ifit+activation+code+proform PDF link annotation
    • https://cdn.sqhk.co/dibitarebizu/wPHL0hd/wimukusibasixubizimuvunog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454541/normal_6006d75a7928c.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/nemefurinadu-divirapof.pdfIn PDF document text
    • http://wurijudopala.22web.org/what_books_are_in_the_hobbit_series.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/3648755.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487191/normal_5ff1c07c622ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fffac69960e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_6028c1d6ee123.pdfIn PDF document text
    • https://gutirevenomosub.weebly.com/uploads/1/3/5/4/135400373/xelizagidozixuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/hjQib7n/rotijiwidelisinutij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_600ef436d1b35.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/ejeIjdP/paruzetatu.pdfIn PDF document text
    • https://kivojiwivumupu.weebly.com/uploads/1/3/4/5/134597008/6068467.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/timeziso/best_android_fps_with_controller_support.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/jutagemozogonobumixoneja.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/elise_mid_guide_s8.pdfIn PDF document text
    • http://gabatotudam.rf.gd/13217119652.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/22565822237.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bstc_2018_paper.pdfIn PDF document text
    • http://reduxaxu.epizy.com/3124306045.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/titojadevujazuwenuzujo.pdfIn PDF document text
    • http://nolepukopele.epizy.com/57840458760.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/worksheet_internal_body_organs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADD 5324 bytes
SHA-256: 059114574c8217035e1bd689b83a710b2b3e3f20e3d07862c78e1ffe505c0d6f
font_01_sfnt_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 10672 bytes
SHA-256: bd14f08903b8187668bd87e5f11c1ad0c858f0cdb52c0d0a5c02cfb3f7722ac1
font_02_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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