Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30a602c18bb65fd…

MALICIOUS

PDF

69.7 KB Created: 2021-02-15 10:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3b002c29b112e69630bb7526437a5bdc SHA-1: d777a5b4c63024b41bd82cb48c80a88ed9f52cd3 SHA-256: e30a602c18bb65fde216197c11ad9cd5579da9c00b70fcc879663cca2d27eec0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and Weebly subdomains, characteristic of a link farm designed to obscure the ultimate destination. One prominent URL, https://jottigo.ru/strik?utm_term=pvc+pipe+3d+model, suggests a lure related to 3D models, potentially to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/strik?utm_term=pvc+pipe+3d+model PDF link annotation
    • https://vinixojaz.weebly.com/uploads/1/3/5/3/135312356/3270930.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/search_instagram_account_by_email0gio1.pdfIn PDF document text
    • http://alteramaks.world/chemistry_solved_question_papers_with_answersnaddm.pdfIn PDF document text
    • http://1fps.ru/b1_english_reading_textsmc494.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/xukita.pdfIn PDF document text
    • https://xopisamu.weebly.com/uploads/1/3/0/7/130776659/7518463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ffe4f8214895.pdfIn PDF document text
    • https://sumewawuvivifos.weebly.com/uploads/1/3/1/3/131380344/sobarube.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/1975272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_6022a593ba8f2.pdfIn PDF document text
    • http://arendagg.xyz/eu_gmp_guidelines_for_hvact2y7j.pdfIn PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/fetevutegotasevi.pdfIn PDF document text
    • http://uscovidcharts.com/3456702057zk779.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://s3.amazonaws.com/levumoduf/ncert_full_form_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/understanding_food_nutrition_labels_worksheet.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_off0000cac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC0 4560 bytes
SHA-256: b199be78de8a4ced5fa67ab7219429f216dc4ada8e80dcbada75a838b45fb806
font_01_sfnt_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 9936 bytes
SHA-256: ba105571e96e452af271d637ea353d4ba10d8c34ca0ea36c077f8d97970ff3ef
font_02_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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