Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2e75893672e2ac…

MALICIOUS

PDF

72.9 KB Created: 2021-03-30 08:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: af37c8bdb649383020ad0a6a2a40ac29 SHA-1: e1ca954ef29a6bc22fc50f5cf536a059df77a6d9 SHA-256: 7d2e75893672e2aca3089085c3058adba83e261e30f3e2e882deb5b10afa3582
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple external URIs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful 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://crophysi.ru/123?utm_term=leepa+valley+weather+report PDF link annotation
    • http://nibakelenixezas.getenjoyment.net/bearing_number_designation.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/35546016940.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/zudowuvomuwadimukafuleroj.pdfIn PDF document text
    • http://nelodagavezes.mygamesonline.org/storytelling_book.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/mazepuvopidutulagowod.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/iperaldosteronismo_secondario.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaxaxotopikite.epizy.com/bhagwan_gana_dj_mein.pdfIn PDF document text
    • http://dalapodomunok.epizy.com/capitalization_in_finance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e757d49-718e-48a5-8190-10041dd3df03/38815400108.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_6db785f6da7e469c970fca00dba3eeb9.pdf?index=trueIn PDF document text
    • http://wemaxoseni.myartsonline.com/35567075741.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/axial_equatorial_chair_conformation.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_0cd90dd039ae46898e662ab313d68fc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8845999d-9aca-4c38-b36a-c9821b0358cd/34027366013.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_ab45d865e84a49899492dc8ff285e94f.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_68306ddf76ab4fe5bc696444a855a603.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivamubug/23894651263.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/40825269997.pdfIn PDF document text
    • http://jusowegakero.epizy.com/husqvarna_automower_450x_installation_manual.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_606d2d8bae6a43a88163b6f9e76ef9f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc91375-a8fb-43ff-b3f3-f8dcffcd3552/45646639202.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_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 4924 bytes
SHA-256: 8aab79477adc63aa549d1adc2f9ddd942b7c8be997183c4c3df4da910383a43b
font_01_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 11064 bytes
SHA-256: 80d2722752935af7749f350ec103b1a4d1f3638c9e6948818991e75332b1cef8

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