Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59d7aa49ba730af…

MALICIOUS

PDF

59.5 KB Created: 2020-10-26 09:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8b389e4bf74e6d52067fe88bbfb6a2df SHA-1: 5b3f45fca0731a1bfdab8c50fb5266c8d5788647 SHA-256: a59d7aa49ba730af9ad84980aa113ebbc168e764d2d89f021ba2fc55f39226f0
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/strik?keyword=wards+pharmacy+ellisville+ms In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/84402237366c033.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/4863d50e.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/sitaroporepujagax.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/nojidaduparubupoji.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/f590d245f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_5f96564a87596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8a44e31b721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f88a2c83a06b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f88a8287055b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_5f94ffc5ed15b.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/labuj.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/7854898.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/700644.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/fulakumezakuwix.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/9463882.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007ed0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007ed0.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000d1a6.bin)
    • https://cdn.shopify.com/s/files/1/0499/3299/2674/files/suxunelofulaludirogupaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/kingroot_apk_download_latest_version_6.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9967/6060/files/90169118050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/pure_substance_in_thermodynamics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4073/7957/files/nexex.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/tulolafipowosi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/93833870913.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xijepobik.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/wivonifepojaxofizigok.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_off00007ed0.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000b4ab.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000b4ab.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 4980 bytes
SHA-256: 649895e1241a1429d6924a27793f89de7156af771abacb1d00284c3c650d2259
font_01_sfnt_off00008fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC3 11020 bytes
SHA-256: b89534c27b98f7b48bc3fcefda0785e74bc7551544821cbfdb7a75a99f834cc9
font_02_sfnt_off0000b4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AB 18844 bytes
SHA-256: 6fffaced9ee25c3bdf8b06df4476ff65b49aa640aade1bf1bee34f29848d04ec
font_03_sfnt_off0000d1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2