Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f675f595fa75920…

MALICIOUS

PDF

89.6 KB Created: 2021-02-20 16:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 33fb6b2ae32ce8bb5f84e9e244bb0b8c SHA-1: 0753b23e1a5744c8366650753b3b2acd28522712 SHA-256: 1f675f595fa759208d4f6a2156791564025d5b6dfecc95fcb3999a017e51916f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=ge+appliance+service+manuals PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367277/normal_602b99599bab5.pdfIn PDF document text
    • https://vinunawamezod.weebly.com/uploads/1/3/1/3/131380031/3d14d8fb.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/don_kiot_kitapeh5mf.pdfIn PDF document text
    • http://mylic.ru/criminology_books_in_tamil_free_download0x7cx.pdfIn PDF document text
    • https://nonibebufixaz.weebly.com/uploads/1/3/2/6/132682934/borikaji-gejojejidixak-posunadifiduzut.pdfIn PDF document text
    • http://bred-enligne.com/ddu_allotment_letterxj06p.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/varufefujewekaxore.pdfIn PDF document text
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/6c18c1ca7.pdfIn PDF document text
    • http://matrixbicycles.com/descargar_juego_imperium_3_gratis_para_pc0qe5b.pdfIn PDF document text
    • http://genusttwsr.fun/720970996yx73x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_5fda3a17f1958.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lofese/cours_grammaire_anglais_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/chennai_express_lungi_dance_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/koxuzul.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/46773609797.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/adobe_flash_player_9_google_chrome.pdfIn PDF document text
    • http://sovavovekemaz.epizy.com/26527727941.pdfIn PDF document text
    • http://kimejuj.rf.gd/best_stop_motion_animation_app_android.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_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 5172 bytes
SHA-256: 825e890c9210bbd213f669822f439d8aefa980697fea1a7202e2a952b1a9e93e
font_01_sfnt_off000133a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A8 11180 bytes
SHA-256: 91e00c0d559f3732cdf359a2ec63e10a40d7cce1b64394b10f250c6e377595df