Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a10b1628d8abae…

MALICIOUS

PDF

78.7 KB Created: 2021-03-14 10:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f0a2cab6e781c149fb8bb2a383e1c1dd SHA-1: 18d45beae92baad61fb357d3a9cbec679b508ed9 SHA-256: 07a10b1628d8abae16baec5172b8cab65c158cd754541063ea72e9a63c989378
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 domains, and is flagged 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 external malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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://pelibifir.ru/wix?keyword=drag+racing+3d+apk PDF link annotation
    • http://bitjoms.xyz/tupemeduruwefebobozilantcdyx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5ffd458ccdf35.pdfIn PDF document text
    • http://dietnatur.fun/multiplying_and_dividing_exponents_free_worksheetslyacm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5fec5b67bf3a1.pdfIn PDF document text
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/038cb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5ffab437445ad.pdfIn PDF document text
    • http://navaram.online/919950111733s6iv.pdfIn PDF document text
    • http://fherixq.com/download_kodi_leia_18.1y73th.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/star_wars_death_star_levitating_bluetooth_speaker.pdfIn PDF document text
    • http://dreamingdeveloper.com/32376239317eurfr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470968/normal_5ff3c09d686d0.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/jegisom.pdfIn PDF document text
    • https://xuduwenonotowud.weebly.com/uploads/1/3/1/3/131379268/ravunemupado.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/49404089002.pdfIn PDF document text
    • https://kamojadatuxam.weebly.com/uploads/1/3/5/3/135316538/ebf0bd69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/frayer_model_template_microsoft_word.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_48bc734dc9cd4b8b8d5db8af4348309f.pdf?index=trueIn PDF document text
    • http://bigapenegig.atwebpages.com/63118014793.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/networking_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_62119ad207ed4252b85127e2e35675fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remavuj/ligizubujebe.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/56382754418.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_3af76c6a2fe14409881cda267227148c.pdf?index=trueIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_cc04f7626edd4db4b5ad8cd16ee90708.pdf?index=trueIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/89765400471.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_b7e4a600210e40c39085790ec67e07d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/94869799164.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_off0000f511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 5260 bytes
SHA-256: 2f6519284ce00ebd2f1e787a14f6fea510df111e29f86ce91d748be817ae95a1
font_01_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 11108 bytes
SHA-256: b05e47e9692d62c8ed0d4fc175dda65b546707b49f03d32a8ca3893d57d4bae2

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