Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae54d4101bfbcc89…

MALICIOUS

PDF

77.9 KB Created: 2021-04-18 23:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 69556254fbe7587399225e7f417c8c0c SHA-1: 2dd7075906a9aafe629408648e27c21fdb50b6c5 SHA-256: ae54d4101bfbcc89d2d6a37cd558299ee27c966281204dcd378c0ef778a9fc19
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://druttle.ru/strik?utm_term=custom+air+force+1+louis+vuitton+women%2527s', is particularly suspicious and likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://druttle.ru/strik?utm_term=custom+air+force+1+louis+vuitton+women%2527s PDF link annotation
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/toter-zuwinusugubuzot-rorafare.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/9jaHqib/dino_simulator_roblox_codes_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/iKKggts/draw_a_picture_in_asl.pdfIn PDF document text
    • https://nizuwutino.weebly.com/uploads/1/3/1/4/131482859/b822b4d2c96931.pdfIn PDF document text
    • http://velibabup.iblogger.org/biology_new_syllabus_download.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/rational_choice_theory_criminology.pdfIn PDF document text
    • http://rokonagusedat.22web.org/bullying_in_schools.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdfIn PDF document text
    • http://terugate.mypressonline.com/complete_electronics_self-teaching_guide_with_projects_4th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuxona/dN2jiJp/ought_to_exercises.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/32708790199.pdfIn PDF document text
    • http://wosozage.mypressonline.com/classification_aspergillus_niger.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/gipuwamatiwibivutig.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/i2jehgO/lafareko.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/suwixezonimijaka.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/68eeb7400.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/2758678.pdfIn PDF document text
    • https://lapidarofo.weebly.com/uploads/1/3/0/8/130874394/1507409.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
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_39d7932c824047888d9b60d83ef590c6.pdf?index=trueIn PDF document text
    • http://gotazuvibidok.epizy.com/mvc_responsive_design_template.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_8c27ed34711247e9b732e143ae8bf4ef.pdf?index=trueIn PDF document text
    • http://tawinefe.rf.gd/how_to_develop_sense_of_humour.pdfIn PDF document text
    • http://fapujeg.epizy.com/tuwomimudiwasosaxatep.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_930c26a1bbd34fee9cb54558d1b75339.pdf?index=trueIn PDF document text
    • http://kimigabajo.epizy.com/amyotrophic_lateral_sclerosis_diagnosis.pdfIn PDF document text
    • http://bigisewolax.epizy.com/best_app_to_read_books_on_ipad.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_631b0b8f9f73405fbdea635f71f900ab.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5172 bytes
SHA-256: da03658f3b90788764f360a8e8bf676d6df966d1f77209189946b70bbd937cac
font_01_sfnt_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 11124 bytes
SHA-256: 6e9cde6d128345f1ab3ac60c532730aa759fdc809f66c6604b6c855e21756f71
font_03_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3