Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b786d6e6891b40…

MALICIOUS

PDF

55.5 KB Created: 2020-10-26 14:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7f608a69aa8cfd63aa82481be39512ac SHA-1: a715ab2409d5832e5bb65392240771b905899a44 SHA-256: 22b786d6e6891b40b892569935c019fa81f15cd2fa5f8bafa4704f086cf2a4e8
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/aws?keyword=birle%25C5%259Fmi%25C5%259F+milletler+antla%25C5%259Fmas%25C4%25B1+pdf In PDF document text
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/6543692.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/taneze_luxezasexozuva_nezin.pdfIn PDF document text
    • https://tovalowu.weebly.com/uploads/1/3/4/3/134375552/zunapi-wojanaz-xojibadik-bigovamokit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5f9674d535b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f90d8ed1cb1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87a04cb3c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f8893d8f0ef2.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f9d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f9d.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000bfa4.bin)
    • https://cdn.shopify.com/s/files/1/0493/7252/8799/files/map_of_palm_springs_airport_area.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3879/4147/files/la_magia_del_orden_marie_kondo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/mipelejelokuwivijemawewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/stihl_ms170_chainsaw_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0591/4521/files/pine_creek_challenge_race_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/american_history_1_final_exam_review_packet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4132/files/zagulumak.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/bahaya_narkoba_bagi_pelajar.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/axis_direct_charges.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/nufobofajiwes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bigger_biceps_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/tamil_news_paper_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3d156f-3093-4d25-b30d-ab3df6a03a75/fundamentals_of_engineering_thermodynamics_8th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e1a98e-a789-4a12-b778-ecb4e03f098e/fogilubiwut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39342157-e273-478f-9a3b-3f6b6767a22c/68206668837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca6951c-8ecc-45ce-b81a-1d6444408d11/zujejaxinexudedelozigenuz.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_off00006f9d.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000a845.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000a845.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9D 5192 bytes
SHA-256: 815962cffa99eaac1a580b9cbd6b54ce9f20c01fdff8b8013d66f7cb3697d7c2
font_01_sfnt_off000080a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A1 13292 bytes
SHA-256: d91834c0620afe7bacd60d5f8ac3958380bdf3e32b4f6d6bf5ed4b5a2e1126c0
font_02_sfnt_off0000a845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA845 16704 bytes
SHA-256: 2d39b4c9734bc2d19fa14ee5441177d18ead1ee2c2523e4e8fa988a3a97a44be
font_03_sfnt_off0000bfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333