Malicious PDF — malware analysis report

Static analysis result for SHA-256 c556a82503f7a4fc…

MALICIOUS

PDF

78.3 KB Created: 2021-02-26 18:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4ee87bc8b6ba5453deb0025005eb9476 SHA-1: 7a394c2a8fff1d5b3d760ebc9f66fe6f51412f12 SHA-256: c556a82503f7a4fc66e9d6ef0e610d3c68e009814cc26f4c3a3711fbd4eed00d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though obfuscated, appears to be a lure related to search terms, aiming to trick users into clicking on the embedded malicious links.

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
  • 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://jacksth.ru/strik?utm_term=history+of+islam+religion+in+hindi+pdf PDF link annotation
    • http://e-devletturkiyeaidatsistemimgovtr.com/mesure_de_masse_cm2_evaluationrqrqr.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/b068ad.pdfIn PDF document text
    • http://liko-sneakers.com/good_food_guide_melbourne_voucher85ez6.pdfIn PDF document text
    • http://palejep.22web.org/video_player_apk_android_2._1.pdfIn PDF document text
    • http://unlockdeals.shop/ketuf9bg6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_600f1f9a2c9a3.pdfIn PDF document text
    • http://itanto.space/72328376534jlwtn.pdfIn PDF document text
    • https://viregexifojimo.weebly.com/uploads/1/3/4/7/134707817/wewaxezivunom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_5fe614004a539.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/7a8e1ea3d2ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_6035da049886a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_60192c2c9ea19.pdfIn PDF document text
    • http://nashremont.site/abciximab_drug_information8u36z.pdfIn PDF document text
    • http://kodatapipezan.22web.org/2224395872.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/desagofasaka_zatobos_kemogepene.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/sodegivil-vifutowudamobut-gawelafuvobowe-xegarepatum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinesiwi.epizy.com/crise_du_canal_de_suez.pdfIn PDF document text
    • http://govogudumig.epizy.com/office_attendance_register_format_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/seborrheic_dermatitis_nice_guidelines.pdfIn PDF document text
    • http://dajomezivurisal.epizy.com/a_series_of_unfortunate_events_cast_ages.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5516 bytes
SHA-256: 4ade09fb731f46ba57439681cfb6899d322998e8b9a15fe69d094f2e5994c535
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 10672 bytes
SHA-256: 5466da41cae075ac2ac4f5b1c3b9a8f856253e31c192f210c375ec0746b12867

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