Malicious PDF — malware analysis report

Static analysis result for SHA-256 1260360b7dfa7b48…

MALICIOUS

PDF

79.4 KB Created: 2021-05-30 18:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3516188339096ed308e1cf8d5a077da0 SHA-1: d261545282ca41b0579d30c3a439a01f1963d7f3 SHA-256: 1260360b7dfa7b484a70faf092ca23bf6501ffd1f08c9750b8274878ac4f0671
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 large number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute traffic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploit execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://jumiwimov.ru/strik?utm_term=medical+terminology+a+short+course+8th+edition+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495264/normal_6021e8c2a8812.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/b03c06c326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_60319b465ae75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5fcecd18d1742.pdfIn PDF document text
    • https://xezolemi.weebly.com/uploads/1/3/5/3/135324657/1823651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_5fefeeaec3ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_6052cd6c2105a.pdfIn PDF document text
    • https://dijemafewume.weebly.com/uploads/1/3/5/9/135992897/ae7015f95d90244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453729/normal_600dcf7f1ac4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479222/normal_606d91f9d3a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_602cf28a1c928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_6012580d5f213.pdfIn PDF document text
    • https://wikexamug.weebly.com/uploads/1/3/5/3/135343860/8640862.pdfIn PDF document text
    • https://dosoludu.weebly.com/uploads/1/3/0/8/130814101/1820849.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/a9555d1f-db9b-41c4-bc95-373a3978ae6b/litogutikabumito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd4026e-3531-48c1-91bc-b6b5d85026e7/who_made_up_each_of_the_three_estates_in_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18076305-ee38-4847-85f9-8cc5a7e11ddb/linux_crash_course_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e88e7db-a36f-4557-9608-c56bdf6545ab/jojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd805e0e-adf4-43ea-81a9-e552f5fed8a8/how_to_use_hitachi_ac_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2552ebcc-fed4-4346-b255-09606528571a/sore_patch_on_leg_no_bruise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a58cc6-6bb4-42e4-a072-869557b632ae/1851546386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544a4842-c722-4bc9-a8b1-83fea9d54f72/39374239653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a16181-c244-43e3-a11f-9afcedbc73d0/kukizuxapip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2327dc67-f8aa-49ea-b6d3-85b4d0d5b4a4/honda_lawn_mower_parts_diagram.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_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 5652 bytes
SHA-256: 52d6dad64255a7f086fbfb1ec73f98c33722f5d92fc1609a5fa1111fc590f047
font_01_sfnt_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 10876 bytes
SHA-256: 2138d8a83ec23cdc30b99c482034ba1aca972040cde38099edc92db48fcee1be

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