Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee752f9bf125321e…

MALICIOUS

PDF

70.8 KB Created: 2021-03-26 11:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5d4eacd1483d5b69e7341d5d00df3317 SHA-1: 23d1dc26f1f96ffbe18c6f107640a67693a3ec9d SHA-256: ee752f9bf125321ee28596046226d28ab72fb40f33e81519dc509c880aa79ce8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farm heuristics indicates a likely phishing or SEO manipulation tactic.

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://druttle.ru/wix?keyword=asl+numbers+1-20 PDF link annotation
    • http://tiwegopoguxuzu.mypressonline.com/31318928917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_6048300b31d78.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/hEnyQi1/lojapabadesuravuziw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368218/normal_5fefe5e7f3a5e.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/mezej.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/yeh_shen_chinese_cinderella_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ajp51jb/12459216716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_6014eb43e7498.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/how_to_read_a_color_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/igDBhfd/miboretakakodokaxa.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/bubeto/does_bose_speaker_work_with_android.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/hoover_wind_tunnel_rewind_uh70820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f0e9be-41b9-4f04-9b18-1ff66ccc8b41/what_is_object_orientation_explain_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/garmin_nuvi_2797lmt_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383ccab4-9376-4eb5-aacf-646b997a938a/what_happens_in_the_trials_of_apollo.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/57429971816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de497db-3837-457f-b19c-a640654c5b5a/22055980518.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/easy_jazz_piano_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/how_to_charge_a_rohs_smart_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a34826e-a2fd-4d0e-9e9d-c9eb3d06e4f6/33051225850.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_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 5108 bytes
SHA-256: bb67480db9dfe63777e42cc8caccdbc6124bd1e3c5ba66fdbb6b2a637183678f
font_01_sfnt_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 10448 bytes
SHA-256: c91573fa75263b2fb659ad72d8cbfde697614db406926d98bdf2c0b911e915b2

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