Malicious PDF — malware analysis report

Static analysis result for SHA-256 89503c6f54536da5…

MALICIOUS

PDF

60.3 KB Created: 2020-10-28 20:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ab239e5f6cfbc5432c3a390ed09b6ab8 SHA-1: 964b18a6b36a86cedaf1d12a2a51654fcfebdbf4 SHA-256: 89503c6f54536da5158d303314c93d30c0747ed96dd6097de9e330baf830b83f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/pify?keyword=legend+of+zelda+songs+ocarina+of+time In PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/pivobuk.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/2361736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f88b9e664539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f89edfb3064e.pdfIn PDF document text
    • https://vigaziwow.weebly.com/uploads/1/3/4/3/134322068/9463692.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/ec566b2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8e60e35e9be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8a14eaf0754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f8d07702c7f5.pdfIn PDF document text
    • https://goneludolazoga.weebly.com/uploads/1/3/4/4/134488647/suwaxoxotelov.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000096d7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000096d7.bin)
    • https://cdn.shopify.com/s/files/1/0433/4885/2885/files/tubozaluwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/edc_track_north_dakota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/radiohead_paranoid_android_chords_acoustic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8691/2415/files/rgas_satiksmes_klientu_apkalpoanas_centri_darba_laiks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6726abd-7206-463c-8c66-c68680f0bc7d/lukawar.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/zadozajusekaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2556/1275/files/lizifiziwudixetezifogarut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0279/6442/files/deserialize_json_object_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/padezefewavi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/28332637782.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/honda_finance_credit_tiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2986/1816/files/jelimoxetuxip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6033/3206/files/barajusufilewedunazawuzoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c2372b-ef97-4409-8bdb-9a81ea34f60c/fazepabajewabepuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/kirozikumopeki.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 extracted file (font_00_sfnt_off000096d7.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000cd7f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000cd7f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D7 5332 bytes
SHA-256: 51b83f4e978efa7c6007395e439666c264f67288152ee0582184ce110b81c792
font_01_sfnt_off0000a8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FC 10828 bytes
SHA-256: 6282007879d1529b046f84d7600faac10e62fca0cd91bcbae268b0c696fbf742
font_02_sfnt_off0000cd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 16200 bytes
SHA-256: ba7905fa80fed2b2abd0c02034961466151e714f7143dce68417c78b38b61425