Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8495d5a2bce9fc3…

MALICIOUS

PDF

50.9 KB Created: 2020-10-30 01:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8160376ff3234a18005012b967f9114d SHA-1: 57866eb73c392de3a2f09378571a1be583d03f75 SHA-256: c8495d5a2bce9fc313f8ffc33e4a0ddac7cd36cbfdac424f592c63742da16ed1
184 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.
  • 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=rise+of+nations+download+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f873523aba11.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/mejewegate_tozabiso_zopewasisosiv.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/towenujixatef_kamabodativi_wewameboxolute.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/tirejuma.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/kiguvaniziruno_miniturepi_vawuguk_gikatazexibu.pdfIn PDF document text
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/zagulix_bunabu_miwega_nugixug.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000796a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000796a.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000b0d4.bin)
    • https://s3.amazonaws.com/waxejajinigafu/ponuwozamuwadogodivot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0208/7584/files/31616635308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9018/8717/files/signs_and_symptoms_of_diabetes_mellitus.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/remove_white_background_from_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f4dae5-a073-4a83-8097-195bb69ec4db/56895049957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e7a5e4-7ea1-463e-9734-90042030de47/82506452527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3459/7288/files/ferengi_rules_of_acquisition.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_off0000796a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 4788 bytes
SHA-256: 9e46c2f7be688fe5faf9f490af8e0b987fba99a6c27f351c306cc04912056861
font_01_sfnt_off000089c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 11664 bytes
SHA-256: bd5bf6e4c7b07380b32d562baac8229bb64236da830bba8216cd73410a14bc46
font_02_sfnt_off0000b0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e