Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30c8666e666d4c7…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 06:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb719b32c5e5ab2a082a45533ca641ff SHA-1: 70a72a8445e7901376abacbac0be5ccb03c7103a SHA-256: d30c8666e666d4c7151389473ddc0d844ed126407970ae032cfde35762b4c31d
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL related to 'anthem pre order bonus not showing up', suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=anthem+pre+order+bonus+not+showing+up PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369487/normal_6013c3ebeeb5c.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/17is5OX/18507987611.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/Mgfrlgd/66680009743.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/ecological_systems_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6050d944032f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_6009e713c7137.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/zenidafip.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/gh9ihib/2313910500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5ffb92b388128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_6051590c80a2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fec23a3202e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d013e77-5466-4f50-8f44-b6c61f8d8f6f/86092897650.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_9550d886883a47aabf2d1726994f03d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc0f962-f9b4-469a-86ad-535ae999fac2/does_xfinity_have_a_4k_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60517ebe-d5c1-4998-978f-f0a16c70e038/spektrum_dx5e_flight_simulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8a702b-9446-4511-af82-0f59f31c7e23/how_to_fill_sodastream_co2_bottles.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/que_es_un_antipiretico.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_91c7e234bdd543488a61636705d4a905.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e69d57e-5b7d-4af4-a80b-b0cc5ac0bd11/sekudixoradad.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_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 5352 bytes
SHA-256: 898ee74621c43a6d1c0d4b6cab80f18750a65d23534ce26aeab2ea825b6cc7f2
font_01_sfnt_off0001168d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168D 11812 bytes
SHA-256: 0e3d0c9bef5a1d1038a44dce36c739b209d8e4e0cd4aa28f71c6be3589196c3f

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