Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e0fd0e4dbaff73…

MALICIOUS

PDF

84.0 KB Created: 2021-03-04 23:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: be1e8a1a859e89f35ad195b990006fa6 SHA-1: 7ef8b3adea93efcd559d7da11004f3cf494c84e6 SHA-256: d9e0fd0e4dbaff7399664bf256d1c1dd10a3765eecb3e4add2184763d602a045
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, with one URL specifically mentioning a '30 day eating challenge to gain weight'. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the phishing lure suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://xajibur.ru/strik?utm_term=30+day+eating+challenge+to+gain+weight PDF link annotation
    • http://sdfafq.info/57518609309fbyt3.pdfIn PDF document text
    • https://lariwajiko.weebly.com/uploads/1/3/4/3/134316624/1458303.pdfIn PDF document text
    • http://creditreportus.info/tipos_de_sistemas_operativos_caracteristicas_y_funcionesie0t0.pdfIn PDF document text
    • http://milanbeachs.space/warhammer_fantasy_battle_world_mapjioig.pdfIn PDF document text
    • http://watogoda.mypressonline.com/my_sweet_audrina_lifetime_movie_synopsis.pdfIn PDF document text
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/7790856.pdfIn PDF document text
    • http://voirly.xyz/after_effects_templates_free_transformer8j4dk.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/sat_practice_test_3_answers_2020.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/99656326946.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/sparknotes_animal_farm_chapter_7_and_8.pdfIn PDF document text
    • https://diporatefumidal.weebly.com/uploads/1/3/4/4/134489634/ruwirejapilade.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/kumukukelorepifatul.pdfIn PDF document text
    • http://winoorama.website/688722430853bkf.pdfIn PDF document text
    • http://gbo.guru/tracfone_lg_k31_rebel7m8eo.pdfIn PDF document text
    • http://parkingtest.xyz/56115272893w0xgp.pdfIn PDF document text
    • http://bossyonlinex.com/precalculus_7th_edition_textbook_answersmt0ew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wugujub.onlinewebshop.net/g-shock_rangeman_gpr-b1000-1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e45c0d-ebb3-4d59-8192-51cfc174b31d/ketosis_cookbook_australia.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/sezew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d0c5b3-7df4-4e0e-85b4-9eedeeb5ce3a/razujidib.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/the_flower_of_life.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/2021_mustang_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f890dda0-6881-455d-9cad-177c29ad3f79/fasotodegoterijatiguma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59d38eb-5ae8-4a67-ba5a-6f9471e40373/81732893255.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 5120 bytes
SHA-256: 25c7dcf9a2a77d923aaaa0676b45c87c1461b57ccc7a2f4a2a5f28232c772023
font_01_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 10528 bytes
SHA-256: 77e57012362890f59b3d1a77240d37d91f4745f5a5327cb59907294e911af0cb
font_02_sfnt_off0001341b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378