Malicious PDF — malware analysis report

Static analysis result for SHA-256 216ec1bb9bf307de…

MALICIOUS

PDF

76.8 KB Created: 2021-03-21 05:28:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 903f13ac7ab037734e87f2c85996fda4 SHA-1: 50bff29a8a0a5eadc3bfbc156e10cbf64c2f1fbc SHA-256: 216ec1bb9bf307de87b84d94a5f46d35392c94a0f1cbf4e75b219769d9cad439
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/123?utm_term=britannica+illustrated+science+library+pdf PDF link annotation
    • http://artelamp.store/zinezejawatidajobopuxuradvk1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376362/normal_5fcbcd17f0849.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/bazuxurob.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/15769641662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_604b7d50f1f87.pdfIn PDF document text
    • http://dabedera.mygamesonline.org/nuledilinopiwagulugudi.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/zitumebun.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/kinefaripidixulofumekib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5ffd4c0fd9c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_603fb9b34f957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471682/normal_603c6d10dac42.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/the_relationship_cure_summary_chapter_1.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/xusuwanerawupuriletadul.pdfIn PDF document text
    • http://shopbest.online/betovidaxavofowin2r504.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/bokashi_fertilizer.pdfIn PDF document text
    • http://oblakova.ru/69773262311p1o0o.pdfIn PDF document text
    • http://vesefotaso.iblogger.org/pathfinder_2e_advanced_players_guide_archetypes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merapenerabari.myartsonline.com/8900979897.pdfIn PDF document text
    • http://wagivudixar.epizy.com/zadaxokojome.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_342d0ad5650d42078290efaa2c165699.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_51178fd9f77640c19a88da685298a96e.pdf?index=trueIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/how_to_fix_install_black_cartridge_error.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_910e5f7ffbea4b14a9b6db3c5264e407.pdf?index=trueIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_792d603dfa8e4edcbf04e86eddce0aef.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_e468866312b945a4ab33455691bc9060.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 5440 bytes
SHA-256: df3fb1ecb115d561a05e85a0658a82272e622af67e037b27b50189c02900bbef
font_01_sfnt_off0000e3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CA 11116 bytes
SHA-256: 61624eab302324f693c3fd8370d5140fb69d16015920e26ea01fd914f74c1aa7
font_02_sfnt_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 17380 bytes
SHA-256: cdea37a298b4cae3f6e2809066acb7aac1b528997aeb459906395ffff96c174a