Malicious PDF — malware analysis report

Static analysis result for SHA-256 95900ba23f67b55d…

MALICIOUS

PDF

79.0 KB Created: 2021-02-27 09:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a03c8788996d9204df47bb7bf6de7f03 SHA-1: 779ddef2d07db1ba5b66781ea217e48addf15b77 SHA-256: 95900ba23f67b55ddf08146e410db1a7e3f66e55ab59452e34101b04d873a3d4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'List of asmaul husna' and application metadata, suggesting a lure to disguise malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=list+of+asmaul+husna In PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_delete_facebook_account_2020_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fd9d8a637736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_600ae2f33a3f2.pdfIn PDF document text
    • http://file-id.ru/safagidonawamhbiyv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_6007c24f4bedc.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/metal_gear_solid_5_definitive_edition.pdfIn PDF document text
    • http://barashik.space/muzolezilixaduvazawehiwaa.pdfIn PDF document text
    • http://milanomoda.site/5311485034358lo3.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/soneburidaxat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_5fd5f600ba7b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5fe501b558c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5fd85acab87be.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/sosatuxafavidokeli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mawokale.myartsonline.com/rikezedusuterezisijigik.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/9516311819.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/oraciones_con_verbos_irregulares_en_espaol_ejemplos.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/the_complete_idiots_guide_to_music_theory_by_michael_miller.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 4616 bytes
SHA-256: 685087e27ef73d1d71d08540eea07fa7d5be32c247a2bba99cf323ba26f4dd52
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 10480 bytes
SHA-256: 5021464fc046f2d8d7fc51d0ae250700fa4a30af1e31f244ac611fb00d31df49
font_02_sfnt_off000120dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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