Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62324bd3bd7a03b…

MALICIOUS

PDF

81.4 KB Created: 2021-04-21 03:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1784825c5ce0d9c26c7cb9992244ee94 SHA-1: 718948f067915d169210381d8337e5c672eefd6d SHA-256: d62324bd3bd7a03b8441b7de47c666e12eadb2a5bf0f1b7e36c95b95e7ce7424
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/strik?utm_term=what+personality+types+are+compatible+with+intj PDF link annotation
    • http://fedexonep.mypressonline.com/jitawatizaj.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/jumedidixas.pdfIn PDF document text
    • http://fomilexavekol.22web.org/aromatic_hydrocarbons_books.pdfIn PDF document text
    • http://mebotus.mypressonline.com/cambridge_collocation_dictionary_free_download.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/mcq_physiology_cardiovascular_system.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/protein_primary_structure.pdfIn PDF document text
    • http://gupirod.iblogger.org/arabic_poetry_a_primer_for_students.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lopakesuzuw.atwebpages.com/48889036335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac74d87-aa6b-426e-8667-5ce71225bf23/pamigo.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/lizutupuvekobut.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_3c2238299e4c41f48f162a80410339e7.pdf?index=trueIn PDF document text
    • http://zirutabu.myartsonline.com/blue_jackets_reverse_retro_jersey_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fdea64-0a41-420c-b38d-d03160ccf81d/what_happens_if_your_tracfone_expires.pdfIn PDF document text
    • https://574dee49-ee40-4737-ae02-340ce2b26f9d.filesusr.com/ugd/b44cf7_14fa96185d8348c8a259ac47ba2057c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0517ff17-bd63-4e9b-a378-8ba35f5a39c4/45340997204.pdfIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_2f0c5cc34029436cb8d7f7c698ea7d63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/912ef525-d534-4f15-8cfd-05b1ecdc5819/which_website_is_best_for_learning_python.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_d03db7f60d354e0ea2fa462c810737fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c425a4-9324-4e28-9d06-dfec11efa8ca/boguju.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_cbde9230cae6483e8f23a4b9062c47e3.pdf?index=trueIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_d42798b0b09c43eb88c0d339ceebd6f2.pdf?index=trueIn 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_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 5596 bytes
SHA-256: 429fde2078a5ddde70851f6666a77bc8490ef23956cfef3f0e26099899efbf44
font_01_sfnt_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 11576 bytes
SHA-256: caf81d05f1decc1a0bf42e3713f785822b72ebfe5e17752934bb32c3bb299180

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