Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d069c0e2958698b…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 02:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 37068ff7cb6fc08cd5ac596378442d70 SHA-1: 88e6d10871f4f2c8437d2f9f86f04adb16b1aa65 SHA-256: 0d069c0e2958698b40a43f00830a6e9992e6e9ff0e02eda7208570dc8e4165ab
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords that appear in one of the malicious URLs. The presence of numerous embedded URLs, many pointing to disposable domains or redirectors, strongly suggests a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=acido+sulfhidrico+formulacion+quimica In PDF document text
    • http://fdvsefwfrw.space/nukagugovolifonoxowj6dio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_6003e7485e910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5fdb6f1f7519b.pdfIn PDF document text
    • http://nickned.me/847854476236y91w.pdfIn PDF document text
    • http://udilische.club/renumoxudaboguroziw2bkk.pdfIn PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/kanasil_tifuvov_jikuzasusaluna_zuzejurebomuk.pdfIn PDF document text
    • http://ellmax-site.xyz/jilimumomoweliweze1tvul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5ff45ef6ab38f.pdfIn PDF document text
    • http://allwoman.site/38864980051cm2fq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://melamepapate.rf.gd/android_developer_settings_shortcut.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/feasibility_study_presentation_templates.pdfIn PDF document text
    • http://wogakuw.rf.gd/charoen_pokphand_group_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/vector_addition_lab_report_discussion.pdfIn PDF document text
    • http://wuparol.epizy.com/sustainability_report_bridgestone.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_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 5376 bytes
SHA-256: 114e2bf19e7a8427cdfdb14ad0e8582e6f01497b801fe80c1afc04a74c38b02f
font_01_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 11276 bytes
SHA-256: 59f09a187ab504dccaf7b511dc99d1a90c1ea2c7203bc42a64ef6b0fd94e5e09

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