Malicious PDF — malware analysis report

Static analysis result for SHA-256 788df03fc63bd178…

MALICIOUS

PDF

62.4 KB Created: 2020-10-25 11:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: cba99cd06f8416f45aae3e0b29a6e990 SHA-1: e8b10f4f3452f0184461188c1c9657422080766d SHA-256: 788df03fc63bd1785ffe69964f56651407dfbe65490ece0d6956d54d2835a4dd
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=advaita+siddhi+madhusudan+saraswati+pdf In PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/zofilekezizaniwura.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/rivid.pdfIn PDF document text
    • https://voganolov.weebly.com/uploads/1/3/4/3/134372868/togavevudirubi.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/9e5d02a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f90444e7f92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8df55b35c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8ccf121a7cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8f8c404e844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8e73d88fb02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f8c53c62ef4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f91339714d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f94f4f021dac.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn extracted file (stream_006_off0000c09e.bin)
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00008759.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00008759.bin)
    • https://uploads.strikinglycdn.com/files/66b3a969-e0e3-4b11-92b5-f1c5ab649d95/tigefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407d626e-9079-4a1d-9a1c-a25e46040b6d/bharat_2019_song_bestwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d7457a-5258-4fd2-b771-c775ef3ae024/wonepafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fc17e4-e364-4df5-b233-a5b03e2aa2a0/63303562338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b130cd6-6b57-40ee-a589-d078c425426c/notti_bianche_dostoevskij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/zuzevukukosugavufatejaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1671/2100/files/88616063681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1109/0850/files/terraria_1.3_4.4_download_free_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7297/8585/files/danby_dehumidifier_troubleshooting_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/wuterigilotabe.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xixegeroromel.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/cash_audit_procedures.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 (stream_006_off0000c09e.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c09e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC09E 12828 bytes
SHA-256: 2f85b7b964e253c813803b56a62f4cf975a04d7a27072b493816ced4369b531a
font_00_sfnt_off00007d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 2856 bytes
SHA-256: ede077bcf9d936b2deabd1ca36e5cf164b77d75f1467ec74ab7a8d43bb048d6a
font_01_sfnt_off00008759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8759 5392 bytes
SHA-256: 0550a3cd3e71a70633db09836435f78b9d0dbcf76cb3f4dae85fbdea4e84d638
font_02_sfnt_off000099a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A5 12464 bytes
SHA-256: d351121e0f5bf3669fbf1e5fc4d407a6b3dc3bfb29959af2179b6b3882e16992