Malicious PDF — malware analysis report

Static analysis result for SHA-256 c333dad116767c9b…

MALICIOUS

PDF

84.9 KB Created: 2021-04-12 17:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2d704f6d925d80562db29e7ab1e054d6 SHA-1: 2907c5ed1d425adfb1f11c3b68ea90b159c7e7f9 SHA-256: c333dad116767c9b037fb86625839438447670d5b6af3195159150ddf3b7e1af
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely involving the exploitation of PDF viewers or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=how+to+talk+about+birds+and+bees PDF link annotation
    • https://cdn.sqhk.co/rubalibuzodi/eqjgggC/ban_hammer_simulator_hack_script.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/desaropes.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/hjgggfH/kokitadunemolusexopi.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/jii8Quw/carnival_city_restaurants_specials.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/aeFjjib/huawei_color_band_a1_iphone_app.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/cynodon_dactylon.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/vig3jfG/pexozojokopubepe.pdfIn PDF document text
    • http://dajexori.mypressonline.com/lutipo.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/ahhzNoI/cheat_master_ball_pokemon_emerald_android.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/ibShjbt/xofagen.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/adgepgc/general_electric_stock_price_history.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/jcpWmYh/dubamolizomoxiwav.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://jonesojawu.myartsonline.com/author_s_purpose_worksheet_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e378ab66-b3ba-4d2e-9cce-744c3dbfefb0/disemozalelowinasubijeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79edd3ef-6244-4bbf-bf74-2a01c4ab31f2/frosty_the_snowman_2019.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/nebetugeputiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99e3c86-5fd7-49ea-a631-976d82fba24c/32461803958.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/xagopixoxabofirirokumib.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/76743295138.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/92035571159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad484d4-e0c6-4b1b-89d3-bcacc2b9f2b2/66387486816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1993c596-1779-4914-ba35-c53b45ca1520/42384005260.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_off0000fed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 4956 bytes
SHA-256: d930657674cd0a6fc7c9ae4bf7d774a9651b04946b9799dfbac1654325f8a91b
font_01_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 11272 bytes
SHA-256: b4c8beb211ace0796975b91509f75a62f64fdd38139b3e5520f24aec9c858c5d
font_02_sfnt_off0001364b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378