Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb9971d3087bb46…

MALICIOUS

PDF

53.7 KB Created: 2020-10-25 10:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 862c19d1054ad26099c46e90142f9cbe SHA-1: 8af871083827319461d6d6c19221770a776aaeae SHA-256: 2bb9971d3087bb46282b2dd4126b9002fc8e6f360df6589fbb10013789c99f7a
194 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.
  • 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.
  • 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://ttraff.link/123?keyword=cisco+jabber+user+instructions In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/2877298.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/murum_sugiz_natonajafikutiw.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/depeviteroxovasagela.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/wokupawutizup_supozanovo_vipetafekegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f874d0259fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f90553db3bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8e8e998f5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8e71f8dea00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f87157227cbd.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/kawotexulozax/867112801.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/an_astrologer_s_day_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/robirixaki.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/74649980346.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/banderas_del_mundo_para_colorear.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/tes_cfit.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bncc_educao_infantil.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/barche_lamsel_prayer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7130/2553/files/27963944483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8997/2385/files/ejercicios_leyes_de_los_signos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/sokibavowisawepogezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/9648675281.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_off0000939a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939A 4880 bytes
SHA-256: a6dba97e1fd66cf875e4e55be79f482e1b5be77304628f42e82765b7c3d28432
font_01_sfnt_off0000a443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA443 11108 bytes
SHA-256: b2f767ad51bf042c238d2f0d0c58310eb6c766b44e163edf24d9fc3e2c44bc63