Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ceb6b8ea72dedb7…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 03:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13244344b26caae35245603221cad84d SHA-1: a52e072534b7072def50fa95f5b8bd0241594007 SHA-256: 9ceb6b8ea72dedb78b3fdf8d817a8e92f6505df114b361059f696f97b962f5bb
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to distribute malicious content. The document body, though heavily obfuscated, suggests a lure related to 'nurse anesthesia pocket guide pdf', likely to trick users into visiting the malicious URLs. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://soxebez.ru/award?keyword=nurse+anesthesia+pocket+guide+pdf PDF link annotation
    • https://tiralilibixadu.weebly.com/uploads/1/3/4/5/134500138/af4144d6.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/39763d1020804c1.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/sub_zero_refrigerator_parts_model_642.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/plan_unico_de_cuentas_colombia_2020_excel.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/zoberamubede_gumosuvefazawis_tigirokebes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_603884b42bf22.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/how_to_test_sexuality.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501495/normal_600e9dff8661d.pdfIn PDF document text
    • http://tizeretozu.22web.org/what_are_news_values_and_why_are_they_important.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fd636c06c27d.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
    • http://tukorokibenej.epizy.com/stress_urinary_incontinence_nice_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22ed0b3-3cef-4181-8e0a-e155fdd8b655/polaris_high_lifter_1000_side_by_side_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/36538560942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bb6ac3-1d30-4233-94f2-080267780832/xagedolanawuvilenuzuwozop.pdfIn PDF document text
    • http://momevoke.rf.gd/50798603362.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/vuluxobilanu.pdfIn PDF document text
    • http://fewubituw.rf.gd/does_amazon_hire_16_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3c3a2e-f773-4335-8122-dc6b40ca0ee0/85691810084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b26a291-e85d-4001-b00b-7250f112b5de/83532876588.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/47149777813.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/los_5_lenguajes_del_amor_download.pdfIn PDF document text
    • http://lavisekenesavof.myartsonline.com/application_for_residence_permit_hungary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b3018c-68a4-4b1c-b9c9-c6f71ce67cba/can_u_use_ps3_motion_controller_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/2008_holden_barina_workshop_manual.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_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 5300 bytes
SHA-256: a6c09f55d10caad306980305d3ce1855e19467b66a42f7d3bd6a5e83a4ff32a8
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 10348 bytes
SHA-256: 8738b4477f96c53babc682c276146880c6477d1a61f866e7949f05d16fc5b5cf
font_02_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2