Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7f56722e019678…

MALICIOUS

PDF

85.4 KB Created: 2021-03-03 05:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 90f7f88e94b80db684ef47e993921aec SHA-1: e6a791f3943e86ccb280a62aaf80e52cc60f7784 SHA-256: ef7f56722e01967863638ad0d82b047bc87d849dce2fe947facf3b29bacafc72
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly those hosted on Weebly and S3, suggests an attempt to redirect users to potentially harmful content or phishing sites. ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/123?utm_term=rumi+poet+love+quotes PDF link annotation
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/83892f0.pdfIn PDF document text
    • https://susuwiwonilo.weebly.com/uploads/1/3/1/6/131606006/wabafuw.pdfIn PDF document text
    • http://olymp-trade.top/apple_next_earnings_report_2019bt1v8.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/4427711.pdfIn PDF document text
    • http://idealica-uficiale.website/2722848444ntlm6.pdfIn PDF document text
    • https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/5ca26ac1419d.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/8057016.pdfIn PDF document text
    • http://brumbum2.xyz/main_tera_boyfriend_raabta_song_downloadp1dri.pdfIn PDF document text
    • http://cparta.moscow/dictionar_tiganesc3iukr.pdfIn PDF document text
    • http://lumacy.site/world_s_dumbest_questions_and_answerskq7gh.pdfIn PDF document text
    • https://pilinuxuxip.weebly.com/uploads/1/3/2/8/132814996/leduvulimapuke-vadij-neguwetifog-belibevetu.pdfIn PDF document text
    • http://look-hotel.com/activities_for_preschoolerse1uwi.pdfIn PDF document text
    • http://frontglass.xyz/webasto_diesel_heater_wiring_diagramhp281.pdfIn PDF document text
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/8733844.pdfIn PDF document text
    • http://begdas.fun/how_to_find_standard_deviation_on_a_casio_fx-9750giipdwrh.pdfIn PDF document text
    • http://italiabeach.space/jonujevogodefipew6izie.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/dazifozixawus/kuxemawarunevezuwevogaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/is_the_raven_queen_a_god.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/what_is_considered_a_good_gre_test_score_for_mba.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/28945011951.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/vironibavalawobazapis.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/3288683242.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/princeton_oligarchy_study.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_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 4852 bytes
SHA-256: f99fe4596f770b9957b93f5eb036ff42007ba4a63dc76d0a47f6e9c44828110b
font_01_sfnt_off000124bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BC 10376 bytes
SHA-256: 77afda4f99b252ffc2feeaf5cc23f48c28f5ba4a6a33b930f6637e50abb22687

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