Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd6bca69afae732…

MALICIOUS

PDF

58.7 KB Created: 2020-10-25 03:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fdd9604c709b75c6629a3edbdd793fb3 SHA-1: 31d4022b347cd24d2e6c364fe18dfd2351b697bb SHA-256: bcd6bca69afae732382927b7d78b132141501a9a6a94a30d1221906953256c39
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=free+printable+cursive+alphabet+pdf In PDF document text
    • https://netaterosani.weebly.com/uploads/1/3/4/4/134438803/ropezej-zunerifisemobuk-vunorotagetapu.pdfIn PDF document text
    • https://jopulovi.weebly.com/uploads/1/3/4/2/134265775/2c3622c7ca134.pdfIn PDF document text
    • https://fogajabewe.weebly.com/uploads/1/3/4/1/134131707/powovo.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/vasemodifo.pdfIn PDF document text
    • https://wimejevufafej.weebly.com/uploads/1/3/4/3/134379448/76d60.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008d56.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008d56.bin)
    • http://www.opentle.orgIn extracted file (font_01_sfnt_off00009f9f.bin)
    • https://s3.amazonaws.com/gupuso/gomewalepupitezos.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/90783994472.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/addis_ababa_city_map.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jotodawonagugotelezipusik.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/reasonable_faith_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f68903-175b-4bec-baec-b69f3d87f43a/nagapawokiwikam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668a8060-c783-4b23-b5f7-9884b5b3a6b3/96580604993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0340b64-5610-40eb-aa94-97362f454aa1/beyblade_metal_fusion_episodes_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06752b1a-5e4c-41a4-a56a-fdf38e579ea9/tufigewakodoguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9535d92-9c37-4354-a50a-e8d6ec57d99c/sedoxonidogiguzedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c65bf9-cebd-4146-b93a-87e737daf939/fibijexawesog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2379/9723/files/3643686288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2399/9391/files/digik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a1047d-7a1d-4e3a-8b8f-64f3d996148f/11783515159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d161bb-93fb-47f1-bc08-255e11f8bc8c/ernesto_jose_verdura_vizcaino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1edca1-4323-4140-b769-28fc8af201e6/dewamoniwedad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e16722a-028c-4649-9039-3ec58f169ce4/96486086818.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_off00008d56.bin)
    • http://www.gnu.org/licenses/gpl.htmlIn extracted file (font_01_sfnt_off00009f9f.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D56 5396 bytes
SHA-256: 735b7597500b6069b9bf5c93c73d30f34748db987da570b3bcf4a7a0a1eb29cf
font_01_sfnt_off00009f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9F 6152 bytes
SHA-256: f75a5b5f6aa45c79024a8eb628001d462a858c4b5edb13eb9ffd2811b38648b1
font_02_sfnt_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off0000b7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A6 10628 bytes
SHA-256: 893a41f5d41bde813ed7bf7a94a43c33a5189453d39150d5e5d35b7f0d9f197b