Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9ad4e156a5c16b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 13:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4df5f575a57e0fa9289ba85c5be1821a SHA-1: 4b19474b8b9c08e1c701f25cc708d0817d296ace SHA-256: 3e9ad4e156a5c16b5f5916fd32322e170cb98c3487774703d2646ad3196228f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are presented as links to download content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and a link farm heuristic further supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/award?keyword=carol+of+the+bells+partitura+piano+pdf PDF link annotation
    • http://ilkertr.shop/arsenic_and_old_lace_1944edwt6.pdfIn PDF document text
    • http://erogan-encolumbia.site/tablas_de_multiplicar_para_imprimir_en_color47p5q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fc91dd96a48e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fc877aec0b34.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/bNhhjDE/nugalolasaxemowepozojerog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460460/normal_60492eb04d0e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_6027e60a1f0ac.pdfIn PDF document text
    • http://photoforce.ru/wagofawodijoriw0vbt.pdfIn PDF document text
    • http://bossyonlinex.com/download_preset_lightroom_ala_selebgram_free9106p.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/fNifyjg/lewibidu.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/MgUVifP/47296923414.pdfIn PDF document text
    • http://nimened.66ghz.com/dawson_s_creek_season_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/iujglhd/napasu.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/gavexafigemixiwu.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/83066708536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5fea31df35059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://busapow.rf.gd/autocad_electrical_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a909ea-7b5c-41b4-92a3-0d57cb359db0/me_before_you_full_movie_free_download_300mb.pdfIn PDF document text
    • http://muxolisakij.epizy.com/center_of_earth_movie_in_tamil.pdfIn PDF document text
    • http://dulubuli.rf.gd/39254326961.pdfIn PDF document text
    • http://xutugaveteselul.epizy.com/how_to_fix_a_screeching_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9078ce64-6019-48ee-87e9-bad358f0458b/vocabulary_words_for_9th_grade_s.a.t.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd58f47-b18f-4528-990b-536fc1f2fcbf/18931299719.pdfIn PDF document text
    • http://baxewape.myartsonline.com/runapisobukobexetegib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad56bff-ce5a-4580-b91f-faecaefb1238/wuzubafe.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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 5176 bytes
SHA-256: e7e3dfa556baaaabcd6d009f356c098e495318a44b31890b06c57a11109bfab8
font_01_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 11792 bytes
SHA-256: 74024dfe276fb4c4fe3abf6458589a404aa7081d460bbbd492fb0b49c2146083

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