Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb02b1780e7e3f81…

MALICIOUS

PDF

62.5 KB Created: 2020-10-17 06:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a338cad92e993473082103463d7da6cb SHA-1: f0de4629ea08fdda69e10364793f503988efecfb SHA-256: cb02b1780e7e3f81147e9c478af43ae7a1df6947e1d5122d5d58e7ed1a8316f3
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=el+cuarto+de+atras+pdf In PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/dujogibaw-xovozakarup.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/kuxuretuzeruxob_balefeminav.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/zixaweg-zuzevawegisup-nelurazawabevo-tugagumuw.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/d2f2ed23903f3.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/damumo.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/dubepeloguwobi.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/sofunolofokex.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/dalamazerozana_buwalukozoj_nuluxozudowabal.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f89f492b3e0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f87eaedbfa56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f88b8ed76cd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8665/2614/files/75304888418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8884/8057/files/fau_high_school_gpa_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5123/3692/files/catcher_in_the_rye_argumentative_essay_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4682/7694/files/37275162761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3185/5772/files/denadasibejub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d94fe4b-bb6f-49fb-83c2-9169058c4709/serapolivixarajosuzezug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c45bc8-55b5-47b5-8a21-52870a726f2c/pavolumodaziponaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a147fdc-3c10-4030-842d-39bcce2f4624/larafolixoxotarugolepiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6619ba14-e653-4722-9b5a-e42ca3dedce7/figunugagewapedinolovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3166d16d-bf99-476d-9b73-eef55dc4328b/55431818948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac34701-5c5b-41f1-ba48-ce50c01c243b/tesevibomulod.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_off0000b325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB325 5108 bytes
SHA-256: e270faa1ff6564dc98bdf21ed995f09e6532517beb1d15f02e26877732711dc5
font_01_sfnt_off0000c492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 11808 bytes
SHA-256: e676ae75a9ad85adb23e0bfb6f59f82b95835d9746875aa4d0d101a26fb429ad

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