Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb19b4ca3a710c0f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 15:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 383c180d2ff039082e977107a436e21d SHA-1: d09477e41689672733115723124db4679a50082d SHA-256: eb19b4ca3a710c0f51b8206a76cd2abbdec048eca2e864f2fb7507f11b99fe50
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for SEO manipulation or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=to+kill+a+mockingbird+mayella+ewell+description PDF link annotation
    • https://cdn.sqhk.co/luwagoma/igaAuie/noxazulujuwitoruw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_6047babc40e30.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/34346095424.pdfIn PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/42186.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/igjWDha/rivatefarifakireviba.pdfIn PDF document text
    • http://zexorusawuwurew.sportsontheweb.net/gasudixulaxidamevukod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6021bfefcadaf.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/fufode_xijab_jegipunal.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/819f2a36d0597.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/lhhiizZ/lozonusupelu.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/eRyg7Gt/rafus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_603b91759d3e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac193eb-3d4a-4cf3-b0c5-50fde00aaabd/98377126495.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/brilliant_quotes_premium_4._3._7_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/que_significa_cuando_alrededor_de_la_luna_hay_un_circulo.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/achyutam_keshavam_krishna_damodaram_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dfbaa1-c80e-4d39-999d-e8f15f3b629f/subway_melt_salad_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710f9a67-8f89-4fa3-b712-01fb4b657351/94469294737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcef4dc-00c0-40da-9b8e-de49cc43a797/what_statement_best_describes_the_theme_of_song_of_myself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11eb27f3-de84-4862-8f93-af284589f7fb/libro_el_juego_de_la_vida_y_como_jugarlo_completo.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/urinary_catheters.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_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 5740 bytes
SHA-256: d194efffc533cb8c38307a70378635fbdebe74c4786c0bd26d7350db95e27145
font_01_sfnt_off00010dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBD 10272 bytes
SHA-256: 5f2d53e055d333ec7c8a1759a45ec6f8d98d4dbc3da93cd98cbd477cd5a1aa1c

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