Malicious PDF — malware analysis report

Static analysis result for SHA-256 194a10415d7a6990…

MALICIOUS

PDF

79.2 KB Created: 2021-02-18 19:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a2b45b5c2d214d6f503d8483ed5999d SHA-1: a06a3bf3d41c121d6e83b31608f7cb9e6c1e1be2 SHA-256: 194a10415d7a69906db662d68ce2dd98f11edc9ad8828de09db0f3ffb62b5c58
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic, along with numerous external URLs, suggests the document is designed to redirect users to potentially harmful content or facilitate SEO manipulation. While no scripts were explicitly extracted, the PDF structure itself can embed malicious JavaScript, which is a common vector for exploitation.

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://baarspo.ru/123?utm_term=lamborghini+aventador+svj+roadster+2020+price PDF link annotation
    • http://m-laskin.ru/megibozurirefogavekopana83a50.pdfIn PDF document text
    • http://clientbluebadge.com/zuvexotutawuwefukuvidikux2r3gg.pdfIn PDF document text
    • http://de-bewertung-889562.icu/heartbeat_song_btsjwpfn.pdfIn PDF document text
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/xujivatafeveko.pdfIn PDF document text
    • https://guwosifewutus.weebly.com/uploads/1/3/4/6/134616196/2324a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_601f17cc5f97a.pdfIn PDF document text
    • http://instapriz.website/12222562271mk74x.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
    • http://mevezexagugon.rf.gd/surviving_sepsis_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/extraction_organic_chemistry_lab_report_chegg.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/proforma_of_profit_and_loss_appropriation_account.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/catalyst_2960x_datasheet.pdfIn PDF document text
    • http://lifugefumiwikoz.epizy.com/bios_full_form_related_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/xasexurakatipepa.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/61691193749.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_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 5736 bytes
SHA-256: bbfaf80dea3ce318f268d1ee55aabc5aba37d921d1d2ed4e1bdbc922df9b53a0
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 11280 bytes
SHA-256: 44ea1d7936eba8994322bafb98393346c5dc1bd78f0696a37015195bb1f856f7
font_02_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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