Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba7ab2399abcd5a…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 23:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4ef07f953ae741e2800512c60d3a9459 SHA-1: b6ce1f2ad2f5dd92d0e8fc297c7c0abcbcca8808 SHA-256: fba7ab2399abcd5ace62fe655ab9ace0598640c2f4e75f89b36ad961878e5a20
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=toro+blower+vac PDF link annotation
    • http://sovolox.getenjoyment.net/technical_support_associate_interview_questions.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/jiwivusuxew.pdfIn PDF document text
    • http://donbetosstreettacos.com/woodsmith_plans_combination_router_tablertjmn.pdfIn PDF document text
    • http://bumaga.bz/goditifogjw3ut.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/rii_mini_wireless_keyboard_with_touchpad.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/lipiwiz.pdfIn PDF document text
    • http://shoop-fg.ru/mozilla_firefox_for_linuxsmbki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfe2705-d54a-409c-ac61-c681ff73ef6a/matewiz.pdfIn PDF document text
    • http://vaxufedujij.rf.gd/brother_p-touch_model_1280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561f24bd-7994-4f43-acd8-fe23854f0c20/how_to_create_wordpress_database_phpmyadmin.pdfIn PDF document text
    • http://patepupitisozaw.epizy.com/dadiduzesizejaritekige.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_e882f50de3034a5fbff5b1f11972811a.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_7003db35b8744c0a81a60fdc9335d8dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be25cb5-94bf-4f17-a85d-241441380e16/international_usps_tracking_number_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c6588f-723d-4a43-8195-f32ac44373fa/wuwijozaniji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafb164d-c1e6-4e75-b109-4a0bc4cfa906/gozeraxupobedezisun.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_849c0aa292df49a598c475bf5285a900.pdf?index=trueIn PDF document text
    • http://nonogopikizezed.rf.gd/pomisid.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_921e389931d9463b946dba14f13e04fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/928b7581-4b41-4330-b008-52287612bdc6/krups_nespresso_not_working_properly.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_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 4856 bytes
SHA-256: 9e426a98340a273ce8c9877fe90d7e2e74c15a3a8a042af02384abb45f4b46f3
font_01_sfnt_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 11948 bytes
SHA-256: 433a835c735adf961df6a13e91d4b8993b2f44ba13361c6482c3644aca394725

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