Malicious PDF — malware analysis report

Static analysis result for SHA-256 102612dfa3d7c473…

MALICIOUS

PDF

79.2 KB Created: 2021-03-20 02:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b827a0d01ab277a14f6722f108492e5e SHA-1: 4efd1bf770a2393194762a938c08cb33d18cf004 SHA-256: 102612dfa3d7c473be295e8a11c8659e32128adea1ecf8b3987adf4f72cf6504
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 domains, and a high number of distinct hosts, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or serving a malicious payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://druttle.ru/strik?utm_term=emergent+strategy+meaning+in+marketing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483623/normal_602be410cae6d.pdfIn PDF document text
    • http://electriccannoz.club/what_is_a_vanilla_iced_coffee_dunkin_donutsh2otn.pdfIn PDF document text
    • http://mybiol.site/photosynthesis_lab_answer_key8rcej.pdfIn PDF document text
    • http://clientesdkb.com/leatherface_dbd_new_skin8jqkk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_6012e3263e173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5fd934a981981.pdfIn PDF document text
    • http://shimano-stradic.ru/adaptive_listening_skills5lu5u.pdfIn PDF document text
    • http://konupakefatameb.22web.org/50552306785.pdfIn PDF document text
    • http://3bureaureport.info/how_to_connect_multiple_devices_to_jabra_elite_75td96eg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5fdd670b3f0b1.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/cordova_in_app_browser_open.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/66619383147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_6005260639180.pdfIn PDF document text
    • http://banuduxirodeb.mypressonline.com/ciclo_de_krebs_resumen_lo_mas_importante.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/galinikagopit/glossary_of_health_insurance_terms.pdfIn PDF document text
    • http://munixosalal.rf.gd/object_oriented_programming_java_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/lutuwedoven.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_d3ebac7f730f49c99a9f8688e1087165.pdf?index=trueIn PDF document text
    • http://zanerem.rf.gd/12507510853.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/ct_trang_trc_tuyn.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/mefikul.pdfIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_61b65bc9065e48c39fdb9aa029d9366a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/futamo/rowumimiraxuwowilot.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_d853cac9994b4aab9cb4ab8b129d504c.pdf?index=trueIn PDF document text
    • http://golofupatawef.epizy.com/lofamamoze.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/aruba_access_point_configuration_guide.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_494c41ae357944259bee29545071a74a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 5096 bytes
SHA-256: 2ca9067a3c06880e671dc8d1deb73409f1c34ae28ed2fccf2b7824b41ba66cf3
font_01_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 11520 bytes
SHA-256: 5b3b004709d6ec422a1993e9016beadd93f718e42d241c0a832abf8a9637647e