Malicious PDF — malware analysis report

Static analysis result for SHA-256 4859e1c1b73e4834…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 07:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5d0c7d8cfb22977c60b2ca2edd977eeb SHA-1: ee8de25d5a8a725984f54b261c6c6fcb7c236a46 SHA-256: 4859e1c1b73e4834ad070ea98e7b2267175a200f298acadeed8a196cdb03c669
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to download malware. The document body, though heavily obfuscated, contains text related to an Android application download, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=m+launcher+pro+marshmallow+6.0+apk+download PDF link annotation
    • http://fawikenaxalu.scienceontheweb.net/lotorosefedavetikefu.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/31412796425.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/54897605192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzikenevizut.onlinewebshop.net/6th_grade_vocabulary_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4f91cb-58dc-4c16-97ba-c430b8110dee/81395909515.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_00ec8044b2134bd1a3d57f39d292b9a2.pdf?index=trueIn PDF document text
    • http://lufopudizomuv.atwebpages.com/tatomalixaba.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/pupixiboriwatopizosika.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/pride_and_prejudice_characters_names.pdfIn PDF document text
    • http://luvepel.myartsonline.com/35859416167.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_433346d7161e46fcbb8935605b80fe99.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_e125e7ebe43d4b2eaa6a6ff5a7e9d132.pdf?index=trueIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_08ac03df53364798b82dbf5026a6fa70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/68769999762.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/42534302254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7c6d37-cbdc-4878-aa04-5e3d776ac9d5/97493877903.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/asking_and_giving_directions_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/gufetaderatevazebof.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/vicks_germ_free_humidifier_not_using_water.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/asme_section_ix_2020_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/wamadegavuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b265b23-b3e8-4675-9488-1a2122fb6b69/110m_hurdles_how_many_hurdles.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/zalononokebumujifed.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/indian_railway_station_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/environmental_pollution_project_report.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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 5804 bytes
SHA-256: b648f57405c9baa9f543814987f9ba7fe9a73186d056dfbd014f103a59fbbf2e
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 12816 bytes
SHA-256: 76f5db07b520c896e7bb8410af3bebe9fc11e59d831585100af090b8a32578ee

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