Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee09da8e6f26016…

MALICIOUS

PDF

103.3 KB Created: 2021-05-01 18:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 78428c01dbe3c9593f97865b01c0da88 SHA-1: 23413f538abe05c35b510a73dcab8cd43401a0a5 SHA-256: 5ee09da8e6f26016c4f7ab208807335a4a1901b11c62ac4d10a93796db2eef29
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://lozipotod.ru/strik?utm_term=linear+programming+in+computer+science PDF link annotation
    • https://cdn.sqhk.co/verexoleki/jfhbgeZ/virginia_tech_men_s_basketball_head_coach.pdfIn PDF document text
    • http://discount50it.pro/zewitenifamivomodimelo2zt9l.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/wUja8gd/dr_kawashima_s_brain_training_nintendo_switch_game.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/cellulose_and_cellulose_derivatives_in_the_food_industry.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/vjhw80p/duvem.pdfIn PDF document text
    • http://help-igcopyright.xyz/55903593880k0u1m.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/gjYAYjc/old_school_parachute_pants_80s.pdfIn PDF document text
    • http://lassituda.online/metal_rhythm_guitar_exercisesqcvxi.pdfIn PDF document text
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/puxudetobudevanot.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/ajiihgh/fobamibufijowesavesa.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/4ibibid/linear_regression_python_from_scratch.pdfIn PDF document text
    • http://deemonatrafik.xyz/6511218572788204.pdfIn PDF document text
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/4d9cd945e2830.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/swimming_weight_training_program.pdfIn PDF document text
    • http://5gusevshop.space/the_wolf_of_wall_street_full_movie_in_hindi_filmywap_watch_online_freefp90k.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/vexinibijum-serukubesikum-guparazi-jozamurewunited.pdfIn PDF document text
    • https://zawobulogu.weebly.com/uploads/1/3/1/0/131070044/munuburofurutiri.pdfIn PDF document text
    • https://mojakoxo.weebly.com/uploads/1/3/0/7/130739052/sedivupepafuvelobu.pdfIn PDF document text
    • http://sivolejujivozul.scienceontheweb.net/gazeromojenabafoboveta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/47632846889.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/adventure_cyclist_magazine.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/principales_tratados_comerciales_de_mexico.pdfIn PDF document text
    • http://xowuzaxu.onlinewebshop.net/plagas_en_arandanos_peru.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_off00015821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15821 5160 bytes
SHA-256: 1298b03f4a0f2527c530605f244b9f928f60ff5236c3a57a92c6475da0edbad6
font_01_sfnt_off000169a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A0 11024 bytes
SHA-256: aed8e480d4c150b210f487050bd03dd1f7501e0939e1a983b07ed972f09a4f71