Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e353dfc5c5ec99b…

MALICIOUS

PDF

94.7 KB Created: 2021-05-06 01:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4295d0b4ef5459648e90884fb489f5ea SHA-1: 58dee683d5a43420aa30854b13d376be33992634 SHA-256: 6e353dfc5c5ec99b141f3c2f79360c851dc6ec04705feddbd45d8995a0c4b7d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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://zajinet.ru/strik?utm_term=einstein%2527s+dreams+quotes PDF link annotation
    • https://cdn.sqhk.co/botuvawezej/Wfl9ihn/11206911452.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/jRMHshj/pinumuwurowusonu.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/ghHgH5L/64900980194.pdfIn PDF document text
    • http://gagelepapu.22web.org/factoring_quadratics_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hhvQija/healow_app_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/haageie/3548343435.pdfIn PDF document text
    • https://cdn.sqhk.co/bewamufara/dOlhegd/geometry_dash_master_emblem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_606cc611c9159.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/b80JkXV/xukiso.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/fahrenheit_451_study_guide_answers.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/82963187578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_601f14e430aed.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/bghiidV/mikerofitenofakirajebatuw.pdfIn PDF document text
    • https://cdn.sqhk.co/retakabif/ZghjhlQ/nfl_scores_fox_news.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/fieHid3/dragon_ball_z_arcade_game_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://lejufoxulevef.epizy.com/arretez_moi_lisa_gardner_gratuit.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/jeguro.pdfIn PDF document text
    • http://zagupijalixi.myartsonline.com/64073438204.pdfIn PDF document text
    • http://zejeriwetijetez.rf.gd/wefilefavononij.pdfIn PDF document text
    • http://jaziwosud.rf.gd/can_t_stop_won_t_stop_book.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 5056 bytes
SHA-256: 198dd63d60f9b0c61262a1dbfac6a48e92b7b995ee0ba5c9ad86b11f5d78e1ec
font_01_sfnt_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_02_sfnt_off00013f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F48 14500 bytes
SHA-256: 59094661b6dd3f4f7f5415a991ad8101957e632bdafb93980109c62ac407eb2d

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