Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc22c9e15ecaab9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 08:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f9c3b277890db406f00204d4cffbb32b SHA-1: 90820cc74651b62eaf08e2e7850684625752eb7b SHA-256: bcc22c9e15ecaab9fc1742f02407cf7238b9eccda429369d88d91d13d9eac583
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=andhra+pradesh+district+map PDF link annotation
    • http://bibiladiwoz.22web.org/no_scroll_website_templates.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/passive_modals_exercises_online29z2t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5ff3008a7b73f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_601078c34b42b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5fe473552498e.pdfIn PDF document text
    • http://womenit.space/www.univ-reims.fr_bureau_virtuel1w82i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_5fe9479e1a3de.pdfIn PDF document text
    • http://trenketo.buzz/23854238072z89vv.pdfIn PDF document text
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/sutopuravik-rixiwadugebe.pdfIn PDF document text
    • http://resimpub.com/jofogexabelofojikozumshkqi.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://kowexefuwuron.rf.gd/free_medical_dictionary_for_android.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_off0000d14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 4948 bytes
SHA-256: 41dce51c02e5a781dcc9f8717dcc0e56dda7d12bd070f215b86c26d515c7bed7
font_01_sfnt_off0000e1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DD 10936 bytes
SHA-256: 27bb75e72b8fc8d37278fc8d12df9805a43f6e6ecfd6c4ac78ef1b2a3c995136
font_02_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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