Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5590d5a1f586a68…

MALICIOUS

PDF

71.5 KB Created: 2021-01-21 11:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 902cc0b5fc209daaafb9a934b38160a0 SHA-1: c87748edd904f34ef7efebca0fedce37e5168626 SHA-256: f5590d5a1f586a68fa6ba3340c7fc8e5d72ccf21381de34e1869284d303303a8
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm on disposable hosting. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or scam attempt, likely designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=advance+wars+android+game In PDF document text
    • https://vonipelimodaro.weebly.com/uploads/1/3/0/7/130738487/7741928.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/2YtdKc8/26015007177.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/nexonepelope.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/6467188.pdfIn PDF document text
    • https://xesudubivutomu.weebly.com/uploads/1/3/5/3/135303490/5606574ad44.pdfIn PDF document text
    • http://kitigaw.22web.org/gobakesil.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/wefuxofedofanelela.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/bidelug-jixenevosivusi-jojarunubem.pdfIn PDF document text
    • http://kewavixim.22web.org/15823419646.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/1964868.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/lukonoradakux.pdfIn PDF document text
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/4888064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimudovi.epizy.com/14042869770.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/nususodebuzolo.pdfIn PDF document text
    • http://jizonizop.rf.gd/33101392851.pdfIn PDF document text
    • http://sovotovagito.epizy.com/manualidades_sencillas_con_lana_para_nios.pdfIn PDF document text
    • http://tededuliwe.rf.gd/nevivubena.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/bsc_mlt_syllabus_rguhs.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/consumer_reports_cars_issue_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/free_probability_worksheets_grade_8.pdfIn PDF document text
    • http://bekabugi.epizy.com/69682937453.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_off0000db80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 5368 bytes
SHA-256: 44842b868153f90291e2680aba0525981bf54397732eaa35c326f4965321075a
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 10252 bytes
SHA-256: 26e3d9c2ad442044ce4aa090a3e905be18c8130a3be973821be9431465174e09

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