Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbba4d532957c590…

MALICIOUS

PDF

46.6 KB Created: 2020-10-26 02:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 8d1260faf9cfb14c83cc358a2c8e1c41 SHA-1: 85baafead0d3a44decd8a51632c947c02150c0a8 SHA-256: cbba4d532957c590b4f33d630dd4b779524617d3329f7528f33385880214272d
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://cctraff.ru/aws?keyword=socialismo+y+comunismo+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/fe4859358.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/1866603.pdfIn PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/bufenu.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/b811e682.pdfIn PDF document text
    • https://besogedawifajop.weebly.com/uploads/1/3/4/2/134234635/38e9e3445778.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/guwijamovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/baab222c-0e27-467b-b35c-af24444dee47/toramumiguvedodika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6656519c-e1a4-4136-abee-fee9a81ff56e/29335885652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00aeb6f4-f4f3-4978-8c7c-28481cfb9310/36783001580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf8f5e8-ec0a-42ca-bf3f-739d4410c1fd/84323405397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff1ce52-1f0f-4afe-9f43-dc539643be34/wolopegozivotepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0969/1807/files/nova_legacy_3_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/energy_conservation_in_waste_heat_recovery_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/phantasy_star_online_2_hunter_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3757/5326/files/19467683302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2431/8115/files/andrea_bocelli_houston_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6384/3260/files/fadomikaxifimumelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1219/3955/files/regafupezilexaginasaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/express_air_coach_dublin_airport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/2449344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7727/6326/files/pokemon_egg_move_transfer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/jelekaxasotazerenogipod.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_off000075ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 5408 bytes
SHA-256: bcfd990a28ba72d0458411ff428e078118cdc215ca2e15d1c0a1a2453d7fea67
font_01_sfnt_off0000883b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 11344 bytes
SHA-256: 8374765949b5cd357d66f21dd877a6bf75449637db7a423c58a37a3762214c29

Open this report in the interactive analyzer, or submit your own file for analysis.