Malicious PDF — malware analysis report

Static analysis result for SHA-256 054d793ece294c87…

MALICIOUS

PDF

79.4 KB Created: 2021-03-21 03:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26fecafebd291eeb319da8d270ef3cff SHA-1: 55314d5d3cab1776f80c23780004010632e5fd54 SHA-256: 054d793ece294c872d8402adab19e421ca282ec48647167a596329ecc2c38ed8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. The primary malicious URL identified is https://nipisod.ru/wix?keyword=mega+man+1+final+boss+weakness, which is likely used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=mega+man+1+final+boss+weakness PDF link annotation
    • https://cdn.sqhk.co/lixipadiwel/jeRRico/napojaxugixagufamo.pdfIn PDF document text
    • https://teduruperalugo.weebly.com/uploads/1/3/4/3/134320262/fenewetiwuvaguz.pdfIn PDF document text
    • https://tetejinuditobig.weebly.com/uploads/1/3/5/9/135973847/medobuvaso_diripigonu.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/ihVRggj/xilutozotojovowejenub.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/2366143.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/3085986.pdfIn PDF document text
    • http://jubevejazuten.iblogger.org/asmaul_husna_yang_artinya_allah_maha_mengetahui_adalah.pdfIn PDF document text
    • http://siruxovilojo.iblogger.org/ramivuwagamasobupinakaga.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/19224486103.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/adding_and_subtracting_fractions_worksheets_6th_grade.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/44713969872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_e459815a4014409f9cdc45135c5f05a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/dowasewabubuzuzepumonoboz.pdfIn PDF document text
    • http://siwixipupiluzu.rf.gd/samsung_remote_not_working_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/google_chrome_chromecast_extension_android.pdfIn PDF document text
    • http://ratimoli.epizy.com/descartes_error_audiobook.pdfIn PDF document text
    • http://sopigovo.rf.gd/niwukowalepovalixasupowux.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/past_simple_online_exercises_negative.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_3094d838b8094679b8f800e0c3cee2dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/17217887922.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/90800781966.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 4548 bytes
SHA-256: 33fdd9c6c152d1db2c921313ed108dd4126419efef87067199e3bfc0bb0bf72c
font_01_sfnt_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 5344 bytes
SHA-256: 586fe5b10e594321da00f774cb3b2a56091dcdb74b655d13be2e8be261dc0c2e
font_02_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 11104 bytes
SHA-256: b9f3ed1c5f6bcb131bbf80debf08919e8ecab4c8aa9af1da5f362a8000afa677

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