Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07bfb78cbef0b3b…

MALICIOUS

PDF

84.9 KB Created: 2021-03-01 12:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d2f25c5388f8751300784e7369ad5a7 SHA-1: 953d9935e0cf89881066b7633f806436c4d77dd2 SHA-256: f07bfb78cbef0b3b1d7d3c6d7a9cd38fe651168c9312407aadf711439196a76f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/123?utm_term=why+won%2527t+my+gas+furnace+pilot+light PDF link annotation
    • https://cdn.sqhk.co/wizokawoxo/bxl19hl/40390565193.pdfIn PDF document text
    • http://jodazok.22web.org/18722633618.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/gipabugafarugi-gomoko-lofipew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_5fe66dc16506f.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/hePjeeC/69246358421.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/ggAjbgf/vagodomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_60246c83d9a9d.pdfIn PDF document text
    • http://cleaner360.shop/83954390393hzer3.pdfIn PDF document text
    • http://vostokzapad.su/zozusimojuj6oy8.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/0idcigd/visefagazubaxe.pdfIn PDF document text
    • http://trixy-matrix.space/verizon_one_talk_applicationsthqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_60123e1823550.pdfIn PDF document text
    • http://lovechat24.club/walmart_corporate_social_responsibility_report_2017cf6r0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulezij.rf.gd/wometofefawi.pdfIn PDF document text
    • http://judafigot.rf.gd/guided_elk_hunts_in_pa.pdfIn PDF document text
    • http://befokube.rf.gd/how_to_test_real_gold_chain.pdfIn PDF document text
    • http://mepogevotu.epizy.com/homophones_homographs_worksheets.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/vupajusananu.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_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 5668 bytes
SHA-256: d1ea307fb80f57726d69dfeb4cef77b954b895e418ece5c4e6d26b66b0bbc5dc
font_01_sfnt_off00011fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA6 11284 bytes
SHA-256: 7405e594f0d6d26e80a8d3ef6f915994e165b1f08c52a6427893fb25c287d089

Open this report in the interactive analyzer, or submit your own file for analysis.