Malicious PDF — malware analysis report

Static analysis result for SHA-256 747a03bdb83dac4f…

MALICIOUS

PDF

56.7 KB Created: 2020-10-12 07:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad81172dd3d2969dcefeaf48aed180d7 SHA-1: 4009293773813067242b430f63c695e06423fd25 SHA-256: 747a03bdb83dac4f145038e2aba1bfe25d32d10b98650f961be73b02b1815e26
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://ggtraff.ru/strik?keyword=protagonist+and+antagonist+worksheet In PDF document text
    • https://site-1042444.mozfiles.com/files/1042444/7314533568.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/guwowepojotodulozemuzozi.pdfIn PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/gojunigijato.pdfIn PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/61474875006.pdfIn PDF document text
    • https://site-1043295.mozfiles.com/files/1043295/wujefukopisadidipibaxuwi.pdfIn PDF document text
    • http://lavedebo.orangelineoil.com/uploads/1/3/1/3/131379877/forujoxodexulo-sonibetanov.pdfIn PDF document text
    • http://saxoguvon.timothyallanjohnston.com/uploads/1/3/2/8/132814946/babazem.pdfIn PDF document text
    • http://files.delawarefilliesfastpitch.org/uploads/1/3/0/8/130813042/butup-faxowasemutimux-zoveredewuraj.pdfIn PDF document text
    • http://files.lynngoldstein.com/uploads/1/3/1/4/131453062/motufajezan.pdfIn PDF document text
    • http://gamuzux.votemikeclark.com/uploads/1/3/0/8/130813785/lisazonupetoguzudun.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/zobokanufimiwobapulusesi.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/66993023778.pdfIn PDF document text
    • https://site-1040609.mozfiles.com/files/1040609/34987382620.pdfIn PDF document text
    • https://site-1042199.mozfiles.com/files/1042199/latebusuginebujasij.pdfIn PDF document text
    • https://site-1042880.mozfiles.com/files/1042880/kesipupof.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/63670609018.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/petarotarotetuzuwiwuw.pdfIn PDF document text
    • https://site-1039380.mozfiles.com/files/1039380/putisilofenepekafupuwog.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/faxiluxonivimogibogag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000a148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA148 5212 bytes
SHA-256: bea5820eb1f11ee444e48519395c2569ce21b6498089f7a29402348d2854dd45
font_01_sfnt_off0000b302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB302 10156 bytes
SHA-256: a407b36ea73256c355ddaafb8998d3a55de965cdd0be304632f1446551275b26

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