Malicious PDF — malware analysis report

Static analysis result for SHA-256 5717e0e06dd240c4…

MALICIOUS

PDF

155.6 KB Created: 2021-03-24 00:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1cecb83ecd57130c2f1922cb47736d84 SHA-1: debaa76d52781149a365bd49442875c98c1bd0b1 SHA-256: 5717e0e06dd240c4dbb599b653b6021272c9468351cc972ce8b0d0143394626e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing attempt. One notable URL, 'https://resalured.ru/wix?keyword=generate+apk+android+studio+mac', appears to be a lure for software development-related content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://resalured.ru/wix?keyword=generate+apk+android+studio+mac PDF link annotation
    • https://tifomuzaki.weebly.com/uploads/1/3/1/1/131163977/kubaxikudululuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5ff5c3637784d.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/bipemapu_xuvifojun_xerukidejel.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/quran_english_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366973/normal_5ffd00ed8a981.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/26f1b7a6b78.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/gezetezabuxefelut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_60261545b1e1a.pdfIn PDF document text
    • http://gagerovovus.22web.org/gefitabesena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/womirofop/9906327801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55f5f70-7e3e-44f6-8522-0a72823deb6c/am_pentatonic_all_positions.pdfIn PDF document text
    • http://wuxuxumeso.rf.gd/monabavofurawopagozukad.pdfIn PDF document text
    • http://bemuvarewu.onlinewebshop.net/aguilera_beautiful.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/cyberpunk_2077_release_date_delayed_indefinitely.pdfIn PDF document text
    • http://gubodasitonobu.epizy.com/10993319950.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/5543712351.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/zorivamenuxexumobi.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/candidiasis_paal_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e11ca4-bdba-4433-8dcb-1879412a5231/how_to_read_a_poem_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a128a6ae-375c-4865-a9fc-d86c18e83aaa/prayer_rain_2020.pdfIn PDF document text
    • http://kozananagejeme.rf.gd/web_services_in_asp.net_using_c_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/kazufafinar.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/4108170755.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 93380 bytes
SHA-256: 2ed645e1536ac68dd1e9f7a111e9ede10f43734aa3dbf172f8db302885f9643e
font_01_sfnt_off00020f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F14 5284 bytes
SHA-256: 7e58bd753046d2f5bc7e48f03069a16a478c4586d33f35c1e8de4f2da1258a07
font_02_sfnt_off000220fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220FB 12184 bytes
SHA-256: 1e43abb3f3e6d501d026f55d9f47759e10be843e2eafe31540dc53afa3c7ddf6
font_03_sfnt_off000249a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249A8 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f