Malicious PDF — malware analysis report

Static analysis result for SHA-256 7add16d4a8248043…

MALICIOUS

PDF

76.4 KB Created: 2021-01-21 02:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6410a7257107380b2d78c92350b0691f SHA-1: bbed9ab1abfafa38f8ac2a2c292ee33c21cd0152 SHA-256: 7add16d4a8248043fbf658ff128650869217a2574c678d3d81a6eb9189dd5185
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://baarspo.ru/123?utm_term=how+much+force+to+break+a+bone', is presented as a search result, indicating a lure to a potentially malicious website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/123?utm_term=how+much+force+to+break+a+bone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc8d4eea3bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fafbfad50892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5fb694bcaca3e.pdfIn PDF document text
    • https://lovevupadu.weebly.com/uploads/1/3/5/3/135328586/duvabobo.pdfIn PDF document text
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/b75ec1a326556b9.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/lerizuvox.pdfIn PDF document text
    • https://javekekowunafot.weebly.com/uploads/1/3/5/3/135324960/9411414.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/tolekexidox.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/tuvukepemabugo.pdfIn PDF document text
    • https://madaremowigefin.weebly.com/uploads/1/3/2/6/132681361/pomofunijaxidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f894a6c9b976.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/dafop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5fffb76f99909.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/muvevanepen/bootstrap_3_css.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/76855425502.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/23218329608.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/ncip_fpic_guidelines_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/contemplated_transaction_translate.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/19480877936.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/android_marshmallow_os_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/chello_divas_2_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/82719781798.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/dus_bahane_song_djpunjab.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_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 5168 bytes
SHA-256: ed99b806ec1ee11d612d5ee3e620f20016999e77976b9d3174990bab4c7e2086
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 10864 bytes
SHA-256: ad56150ff38018bf00834f86a3a8822c782b43a98df4b399fc0f55b70196a4ae

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