Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b9619a2dc13a34…

MALICIOUS

PDF

90.9 KB Created: 2021-03-25 10:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c3b21633c650667b801452d94c289f15 SHA-1: 8e9ab15e6a3c2c93813cac29c16519743ad9fcb7 SHA-256: 06b9619a2dc13a34c70295ae871ca6da07bac1e474e396f5497ded9f546ce3d1
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to search queries, and the embedded URI points to a URL that mimics a search result. This suggests a phishing or scam attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/wix?keyword=go+math+grade+5+chapter+2+test+answers PDF link annotation
    • http://shopeuro.pro/18030962177xn6uc.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/nuronasep.pdfIn PDF document text
    • http://xozonline.ru/what_do_the_seasons_represent_in_the_bluest_eyengnog.pdfIn PDF document text
    • http://mon-fortuneo.best/anything_something_nothing_everything_exercises9dfga.pdfIn PDF document text
    • http://zopevaxawoxe.22web.org/xorokegudulef.pdfIn PDF document text
    • http://ibkreactiva2020.com/airy_video_er_activation_codeypm4k.pdfIn PDF document text
    • http://fixmarker.fun/fedexewawuagtv9.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://uploads.strikinglycdn.com/files/0edc6ef7-d374-4f8d-95ea-ac11352cd7a5/medios_de_comunicacion_en_una_empresa_ejemplos.pdfIn PDF document text
    • http://genupoxozasi.epizy.com/31451620873.pdfIn PDF document text
    • http://bitines.myartsonline.com/strength_prediction_of_adhesively_bonded_joints.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/dobarugokujegebuvupa.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/tableau_lod_calculations_performance.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/meiosis_el_intercambio_de_informacion_genetica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453dd72f-6064-4c64-a512-796cf1c11689/16739132459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e0071e-94d4-4bdc-98bc-044f71618827/kebiwozololosagevud.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/fiddlesticks_jungle_guide_s9.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_off00011758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 5572 bytes
SHA-256: 36430f839ec5e3067200e9658ffaed619cc9a37e666a8ded14a2ba1c8bde425a
font_01_sfnt_off00012a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 11300 bytes
SHA-256: debc93b078ffbb17ac5c420120b5f214f6a9bf52b610bb5da14138571e2d0baf
font_02_sfnt_off000150b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150B6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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