Malicious PDF — malware analysis report

Static analysis result for SHA-256 48eb243532322ba4…

MALICIOUS

PDF

77.7 KB Created: 2021-02-24 20:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 12e6d6ce996ce1ae96ca80860aab492b SHA-1: 2fb4012b537fa05f66d681d26f18663f8b5c476f SHA-256: 48eb243532322ba4c15570a7ccbc214cdf8e0c38073d3c4eb1df93eb82ad641f
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URIs and the PDF's structure point towards an attempt to lure users to malicious sites.

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://jottigo.ru/wix?keyword=writing+a+song+for+a+girl+creepy PDF link annotation
    • http://zeropium.com/fafofazulibasenqi1mo.pdfIn PDF document text
    • http://leduxebawini.22web.org/jake_from_state_farm_name_tag_template.pdfIn PDF document text
    • http://nanolenka.xyz/bard_s_tale_apk_revdlhviqm.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/ijidZhg/domuwofiximuki.pdfIn PDF document text
    • http://immortal-sho.club/hfsa_2018_guidelines00ik2.pdfIn PDF document text
    • http://parhelifrl.space/292286834008hbg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_602f13ad6a69c.pdfIn PDF document text
    • http://naturka.space/xebolivevun1lruq.pdfIn PDF document text
    • http://bilkaita.space/fizajifijegakofoijzuq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_5fd31c6d7b003.pdfIn PDF document text
    • http://hotita.fun/prime_factorization_worksheet_6th_gradeaxkfv.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/6IIWigk/70800665516.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/bams_cch_full_formsmq4t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 5296 bytes
SHA-256: 74c347584393206b904c784399b8aae0c4e441569c60b7284272075dde0669bd
font_01_sfnt_off000104e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 10856 bytes
SHA-256: bbf6da74af24314fe7abba644ef9de55bee9fbbdc79708078f9d6f2c8fb0af47

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