Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dabff144c3b820…

MALICIOUS

PDF

72.7 KB Created: 2021-04-06 10:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e94b11cf0ac476087c7a101e03cdb465 SHA-1: 7561c9cbda46f42307c236ec3d2253a3a5bf850c SHA-256: 98dabff144c3b820c4a7be808f832583516d8133d294780691c1a5316be2c264
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains multiple external URIs, including one that mimics a search result for 'Altronix power supply pdf' leading to a suspicious domain. The document body, though heavily obfuscated, contains references to 'Altronix power supply pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious website. No scripts were extracted, but the presence of numerous links and the overall heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=altronix+power+supply+pdf PDF link annotation
    • http://wamuwosola.mygamesonline.org/dowry_system_essay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5fec9735054f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_60642f3f4f4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465398/normal_604cf72f2d998.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/ezan_duas_arapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_602a00b74ce4b.pdfIn PDF document text
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/nesuwomiguzejas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6014206dbb5b8.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/argumentative_text_englisch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fd83f389884b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_5fdf80a65d0b7.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/2544361.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/zoxezaguduxo_fatunu_xebeginepepodi.pdfIn PDF document text
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/pumotok-fesevokewowawi-juxidulip-tesovidusimux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cb1340-ae08-4f80-95ba-c869b4999091/rozakixeranexiditefanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8716dd-eb38-4970-9846-80b3e57afbb7/zuvowamixegufudivez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c5bd95-b6e6-4e48-b00c-3fd45179053b/how_to_remove_pimples_and_dark_spots_in_hindi.pdfIn PDF document text
    • http://tonorepunad.myartsonline.com/boston_train_map.pdfIn PDF document text
    • http://nakogis.myartsonline.com/aristofanes_by.pdfIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/politik_etis_dan_pergerakan_nasional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c9da36-b1b0-4187-ab53-aae30f9294e8/global_economy_in_world_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c3b096-e937-49d6-8713-25106666e119/15357200837.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/manual_bambuterapia.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_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 5076 bytes
SHA-256: f78249078d54687c3678c529d24671b6695dba18e741db02d860e5fefbdb9aa1
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 11496 bytes
SHA-256: cd7cf57d1e8d534ed0d118e6734dcb4d4f146464af84f19156b3722a37d5b6d0