Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce711162c3b52bf…

MALICIOUS

PDF

75.6 KB Created: 2021-03-30 14:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c3412d94ebd2ad6b1cf70809fc812488 SHA-1: ad3544f6a8f2b7f6538c904c5fe0af3963099561 SHA-256: 2ce711162c3b52bfee0da58e88ed03adfe662b2fe5b3eba580aa15ed4f57deff
176 Risk Score

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. It uses a QR-code lure. 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jottigo.ru/strik?utm_term=does+vizio+have+a+remote+app PDF link annotation
    • http://zuvatewovu.scienceontheweb.net/46641332644.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/archicad_12_tutorial_for_beginners.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/asvab_test_bank.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/fibamavujizitefuz.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/95410994997.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/fivaxikumadixak.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/sports_nutrition_jobs_near_me.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/15618999208.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/halo_mythos.pdfIn PDF document text
    • http://warokibujiz.getenjoyment.net/53467081415.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/buwosevax/3372840775.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/tulasuxik.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/carrier_prime_build_0_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/ferobop.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/cuanto_son_500_gr_de_harina_en_ml.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_8861f96100824782a309d5d7a0c9060a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/mujipodosezewew.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/leopard_gecko_care_sheet.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_d9a89e85198f4928af0b25670f38688d.pdf?index=trueIn PDF document text
    • http://vunonam.atwebpages.com/apush_textbook_america_s_history_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/14053074436.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/critical_theory_today_lois_tyson_download.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_02ba65e594454e969eb3204ae789f814.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somisilegex/diliboruzemidi.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_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 5136 bytes
SHA-256: 5baaeac43633160781a9a8a64c2e7d1464526af6b8c0fc33fb6a856c5cf11103
font_01_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 11156 bytes
SHA-256: b3b15d8f502b4d25b4b292438e111eec014bccf29ed20b809d0b5cf3f8ae9f84

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