Malicious PDF — malware analysis report

Static analysis result for SHA-256 983e100518cb07dd…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 10:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 853030839d1b4bc79fe2d66ab5fae357 SHA-1: 3cfd108cbdde0d28b6c8cf9d2bd2f81b526a4f24 SHA-256: 983e100518cb07dd59cc5d59864e5717dd2045d8002977f6b356d11972076a4b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan, and an ML classifier indicating high maliciousness. The document contains numerous embedded links pointing to external domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=dark+city+imdb+parents+guide
    • http://beveram.66ghz.com/anita_baker_no_more_tears_song.pdf
    • http://igcopyrightclient.com/63588178483vswcx.pdf
    • http://4338bacchus.com/chess_openings_pgn_database_downloadrhmg8.pdf
    • http://ooovseanalizi.ru/5185547346u4cwc.pdf
    • http://lesantyqas.online/77327526596k8avi.pdf
    • https://cdn.sqhk.co/koporikog/Ahfgjje/12952897067.pdf
    • http://universityru.fun/paxibajagolitumoj9jqym.pdf
    • https://cdn.sqhk.co/woxipepevati/gXLjc6Q/journal_articles_on_entrepreneurship.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_0935eae1835b43d3889e6e4d47f8d8fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11946a52-eb64-4d73-bdbf-612d954f8a5f/amana_front_load_washer_clean_drain_pump.pdf
    • http://buzuxujov.epizy.com/dd_3.5_planar_shepherd_handbook.pdf
    • http://luwusifijusu.rf.gd/39537702783.pdf
    • https://s3.amazonaws.com/daniwodug/pukesegamewodigaz.pdf
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_c3a100c496d04adabeae4b6d461e6b1f.pdf?index=true
    • https://s3.amazonaws.com/poresi/4249346176.pdf
    • https://uploads.strikinglycdn.com/files/af6e3aa0-32d1-4db1-9742-289cc850c5fd/sisterhood_is_powerful_published_in_1970_quizlet.pdf
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_176dcb1ea70e41a5ad9908519ac7ca37.pdf?index=true
    • http://pefogitoveni.epizy.com/epson_wf_2630_driver_for_ipad.pdf
    • https://uploads.strikinglycdn.com/files/70ef23dd-947b-492e-b9d3-7a151cef1977/mokubekutubinikubal.pdf
    • http://tudexobus.rf.gd/crisis_communication_plan_template_word_doc.pdf
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_9f7373fefb76440da404c7b130fa8af2.pdf?index=true
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_6fa74cb9db0e488784094fc6e74b06de.pdf?index=true
    • https://s3.amazonaws.com/xupizewuxere/padoliwunefik.pdf
    • https://s3.amazonaws.com/vososasoxumete/srimad_bhagavatam_moolam_sanskrit.pdf
    • https://s3.amazonaws.com/defujo/nuwobaxonerozite.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b3.bin
2d153e0d711452fd8f337141c00a79fbe10945c1280b9b74c901944efbca005b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 5664 bytes
font_01_sfnt_off000106f2.bin
0135920955d4e53099872df838af9af6319b3c23e5880e3f2c54e5aab0f79c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 10912 bytes

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