Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7428d78a4ae8a5…

MALICIOUS

PDF

81.2 KB Created: 2021-02-24 22:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2f4f56ad3482d393e707cd7a2193f31e SHA-1: e18aea4107a0d535b5835c636b9210be1a3c5107 SHA-256: 7c7428d78a4ae8a53379cc34233746e70efca696f0a04545fd43dbd27f857de9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is designed to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/strik?utm_term=what+is+bretman+rock+real+name PDF link annotation
    • http://likedizar.medianewsonline.com/woxinedurul.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/icMiaSF/fanifarasozosomutoliti.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/18259.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/ronovab_mekifaborutomax_xumugezemu.pdfIn PDF document text
    • http://tricitysikhs.com/american_airlines_pilot_salary_per_hourd7vjg.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/zo6lhjf/bugsy_and_meyers_flamingo_las_vegas.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/tikikusotixamifavagas.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/7690509.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/pufixozatopulat.pdfIn PDF document text
    • https://cdn.sqhk.co/wibepudib/cdhhAyy/final_fantasy_xv_pocket_edition_apk_obb.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/93447391.pdfIn PDF document text
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/1c95d69dd9.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/why_is_my_xfinity_tv_box_blinking_green.pdfIn PDF document text
    • http://fitokaps.xyz/bifufakizedoxegubogpws6c.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/chgNIgg/51771366504.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/rupuxedomanovi.pdfIn PDF document text
    • https://fotijaxak.weebly.com/uploads/1/3/4/1/134108731/095a6d0f0c0c7.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/9281927.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/1ohcVjf/oneplus_7t_theme_for_oneplus_7t_pro.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://rususekobijo.myartsonline.com/porque_estudiar_administracion_de_empresas_yahoo.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/guxexitesekelakekewazomej.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/commercial_kitchen_hood_fire_suppression_systems_cost.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_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 5044 bytes
SHA-256: 68b5bbcbea5e181c075726e788d41197ddc6b537713b0014628afedf366327e4
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 10796 bytes
SHA-256: 9ec53bd38dec6a00c60aa4ea0c3c6bdd91de58ba6ca500b54e15e4ee6a0a245b
font_02_sfnt_off0001295d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2