Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fbe2a9c13bd0c2…

MALICIOUS

PDF

75.0 KB Created: 2021-01-27 08:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 014e2202b72c67f436922f6f1d85a193 SHA-1: 9425f78e1dd2c169843c6450150c254ecc4a2321 SHA-256: 27fbe2a9c13bd0c2ad2343a2194ac33630746eeaabcd44af5ad663690b48b1c4
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an external URI pointing to 'https://maypoin.ru/wb?keyword=download%20o%20launcher%20mod%20apk', suggesting a phishing or malware distribution lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with one pointing to a benign-looking PDF on AWS. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://maypoin.ru/wb?keyword=download%20o%20launcher%20mod%20apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388040/normal_5fffe9b2c3ff2.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/47b31.pdfIn PDF document text
    • https://rigawolazi.weebly.com/uploads/1/3/4/7/134710531/7577332.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/24923c0a3f017.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/rovuweraja/google_digital_marketing_certification_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/gold_coast_tv_guide_channel_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/96528313463.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/16975884411.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/tekasosapotaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/free_menu_card_templates_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/worksheets_for_pre-_intermediate_level.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/sowifegilasisezoxif.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/axa_accumulator_variable_annuity_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/10579621974.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/vilazelo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 5292 bytes
SHA-256: ef7e6a8e9535dfb6f20dd283a5494eec719a001c0e282827e2c4b59b1c424bfd
font_01_sfnt_off0000e220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE220 10972 bytes
SHA-256: b62f1898f0b7c78ed8d3b09ef59a40b710fa3cba02820dc9678283c2cc5aaa33
font_02_sfnt_off00010801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10801 16232 bytes
SHA-256: fa2d489b4f3180e9f5b964018b837b388c0f4a64309af494310e183c1dde314d

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