Malicious PDF — malware analysis report

Static analysis result for SHA-256 1500ad5e8eebe327…

MALICIOUS

PDF

77.8 KB Created: 2021-05-05 12:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5df849d2b2901d61c715811bcf5189c8 SHA-1: b1b9f6179944c7b20a7927bddde26651b28ef10e SHA-256: 1500ad5e8eebe3279cdd16fbd6ed403fc0013f538e3c4090d4158376ab844b89
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 0.9996

Heuristics 5

  • 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 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://dafemum.ru/strik?utm_term=what+are+the+national+patient+safety+goals PDF link annotation
    • http://rajajime.mypressonline.com/basic_chemistry_book_download.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/19453380323.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/49175333885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_6005dc3337279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_601a4621c56d8.pdfIn PDF document text
    • http://rijupoxog.22web.org/80340621970.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/pJgcjjL/sky_force_anniversary_switch_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_603537e92533f.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/zjiTUji/18411984982.pdfIn PDF document text
    • http://migasoloraluxuj.scienceontheweb.net/zebozanuwuzosimerili.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_535947475e9e405e8146558e17ebaec7.pdf?index=trueIn PDF document text
    • http://bujijawuta.atwebpages.com/16786770300.pdfIn PDF document text
    • http://tafujeloraxofo.epizy.com/castiel_true_form_fanfiction.pdfIn PDF document text
    • https://c3e780e1-a1ee-422e-80b3-2bf79490ff1e.filesusr.com/ugd/dc7b26_d50aad2a2a5a4b7bb066b39aa23087f1.pdf?index=trueIn PDF document text
    • http://wozimape.onlinewebshop.net/29339848850.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/biographical_recount_text_structure.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/adt_wireless_window_sensor_cost.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_a39fa4826299441d99ba1bb735b8701a.pdf?index=trueIn PDF document text
    • http://dutugege.epizy.com/39705741075.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_9e424d98502149b9971f500c04866f3f.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_e916e75c08a344fda61f61df9d3fa6cb.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_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 5276 bytes
SHA-256: 3b66894347bbcff6e65b693d2e5f30ff9d6a53d405dead7a56bcce23369cf435
font_01_sfnt_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 10572 bytes
SHA-256: 9cc5ab92093d7e84547fb0fa364ca6ecade0b7365f3107a74ad62bf5b436d004

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