Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd610bee15ab0454…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 04:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a17b2124553c50abc596cc03514c186f SHA-1: 5055e1778745bb804cad4f519d4448ea6df3c225 SHA-256: bd610bee15ab0454a65f7b3df7771b18e7f7727de210c8b711085c587eb0593e
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 ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains numerous embedded URLs, many pointing to disposable hosting and forming a link farm, suggesting an effort to obscure the ultimate destination. The presence of external URIs and the overall structure strongly suggest this document is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=ffxiv+miner+guide+60-70 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5fe45c0c4ca2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_60272c5def1e7.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/bunizusoxemezam_jivukelir_nubosa.pdfIn PDF document text
    • https://babaketejo.weebly.com/uploads/1/3/5/3/135304919/wazavejalipuf_jozekekil_kitusewufos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5ff2f27aca3b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fde09843a40d.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/3982334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486354/normal_603e281f35b19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejekowosabukog.epizy.com/infosys_aptitude_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec889aa-bd75-470c-be70-a8b391d4b044/pifewogukosuzug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a89912d-e90f-4f37-b43c-7334c4c9756f/xatut.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/vinesawowites.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/kusazodupidumevaf.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/85794749648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd3973f-281d-44d4-a327-1e81b80d72f4/how_to_do_hand_lettering_on_procreate.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_b226fb2069b84e78b27670fff4c3bcef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a1210f-2978-40b2-8885-f9432cb70ccb/whirlpool_fridge_replace_filter_light_reset.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_3b4a6b349b9644c484660f7be916286e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b27368-a6ff-457e-ae86-0749e59d45ce/nakutokusateladabe.pdfIn PDF document text
    • http://rajivapaw.rf.gd/camping_checklist_australia.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_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 5296 bytes
SHA-256: 4aae556dc0be6e383052c7fa95be4b1a902505e238e12c40b97105ffdd756b15
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 10424 bytes
SHA-256: 3c1731cad2146d51fafc41713d3c7a1f15d21f223341f384cc92bd0d99392646

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