Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cce5991e234276…

MALICIOUS

PDF

70.6 KB Created: 2021-03-20 17:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 41e5b55381ae91b984385df57e3175e8 SHA-1: 2beadb46a8486f41ac3d8f82f159c42c42ddb55e SHA-256: 78cce5991e2342762c9bce80bc42f20846c0da28723e0871f404e3b2daea857d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=monkey+tower+defense+unblocked+games PDF link annotation
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/mododurutewatuw_nidogopiwegu_gososoku_mijasonukidune.pdfIn PDF document text
    • https://cdn.sqhk.co/vedisaso/hahapic/answer_algebra_problems_online.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/muvolukoralin.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/vulazorifebadodij.pdfIn PDF document text
    • https://pokuzasovud.weebly.com/uploads/1/3/4/1/134108684/roranu.pdfIn PDF document text
    • https://sujabowumosof.weebly.com/uploads/1/3/1/3/131398195/wesepixu-memuboxa-zurunimaromemo-kijuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fd7b2d738b3f.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/ih9LidT/alien_shooting_games_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_6044d1d89f756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_6001c3dde9850.pdfIn PDF document text
    • https://cdn.sqhk.co/vedafigula/g2ibidf/truck_driver_city_crush_mod_apk_unlimited_money.pdfIn PDF document text
    • https://xopilinunerixaw.weebly.com/uploads/1/3/1/3/131380618/baxikuluwiwawa.pdfIn PDF document text
    • http://siwarezowagi.iblogger.org/65750226603.pdfIn PDF document text
    • https://laxukiwu.weebly.com/uploads/1/3/1/0/131070933/pagosuworosej-mutejulofeku-sifonazedibaru.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/dthgigJ/53581742354.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/geraromu/99638262753.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/hollins_hall_golf_course_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/microsoft_project_2013_free_download_for_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/tirozumevizuboxalufute.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/fodiw.pdfIn PDF document text
    • http://nadoxomamepaf.epizy.com/web_designing_software_list.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 5744 bytes
SHA-256: 2441505d2226e159c1c692a2f6ff622bc7c5580e7ab8b0d4bf148bdeda35c0ce
font_01_sfnt_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 9608 bytes
SHA-256: 64ed8b68e34d5e3da5daf19812c4444b01dd42c89025da3826fd2cc6fb1c8c28

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