Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e8df023e7ff238…

MALICIOUS

PDF

83.5 KB Created: 2021-04-23 23:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a3b83eaf49f6c4aa5aad02f077cf947c SHA-1: e7a33eb05e55d00ee5c7efeb11770d74e6f493f6 SHA-256: b3e8df023e7ff23811ea013b3a82addd51a8c4a49b4941bacc0e5eefdd08665b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=eddie+bauer+infant+car+seat+manual PDF link annotation
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/zivodopivolexenokol.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/51gcLic/busuzuranib.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/etiology_of_cervical_cancer.pdfIn PDF document text
    • http://itdomen.fun/1994_yamaha_kodiak_400_oil_capacity9jxzt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484610/normal_6019966d0e7c1.pdfIn PDF document text
    • http://richmaya.site/95075758313x2kgp.pdfIn PDF document text
    • http://mx50off.pro/72080091431yjsnn.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/3691183.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzabajixiw/ihlgiic/infection_rate_by_state_per_100_000.pdfIn PDF document text
    • http://efarbok.xyz/pipedizijdwc.pdfIn PDF document text
    • https://puviguwa.weebly.com/uploads/1/3/0/7/130776677/zujatufunu_robiwegeled_redop_guvadovivav.pdfIn PDF document text
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/6310650.pdfIn PDF document text
    • http://namedaun.fun/4724539475kjki1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_6043ecd89c988.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/51360ec9-d843-4348-ac39-142aee0850f4/honeywell_rth2300_4_wire_installation.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/analysis_of_ordinal_categorical_data_agresti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad74136-6da5-4d55-a6b7-35075e64acae/vw_09g_transmission_fluid_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fd0e8b-322a-4134-85ca-cecd914f9ec3/40639889395.pdfIn PDF document text
    • http://polilofu.onlinewebshop.net/11_22_63_audiobook_length.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_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 5036 bytes
SHA-256: 5517b0f7f98c45b810769525eb7d5870635d4aa942dfbe9e7ab72aa649c04291
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 10756 bytes
SHA-256: 12d1e0894850b9f1356fde8164a4cc2f618f916cc3c808f5339cfe40c55f6bfa
font_02_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.