Malicious PDF — malware analysis report

Static analysis result for SHA-256 44da6387f4809f49…

MALICIOUS

PDF

39.0 KB Created: 2020-11-08 01:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 9ce4d1198c548caae2cee62183675ca7 SHA-1: fa76c93649d7545b3cbbb3af35a937078addb6ef SHA-256: 44da6387f4809f4966a87d753f635f1904bc68d24dec3d822396ac9962f03059
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://traffine.ru/aws?keyword=doge+2048+game+unblocked In PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/9676005.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/tijixu.pdfIn PDF document text
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/bofupa.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/f32a19ad1.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/pixupegojuroruk-lojogikuxo-nikafomututaj.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/miborufevutu-dogem.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/20b57de6c3525e.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/rugimeda_revoxuk_subafuxa_xenofe.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/mezitokupik_fukovuliki_xisimim_taletawuripu.pdfIn PDF document text
    • https://vewawuwidavejo.weebly.com/uploads/1/3/4/4/134403009/gaxivorawaw-vewigusaxir-pajabogazef.pdfIn PDF document text
    • https://jopulovi.weebly.com/uploads/1/3/4/2/134265775/c43db9f1e8e.pdfIn PDF document text
    • https://votusaponepo.weebly.com/uploads/1/3/4/4/134471583/28227.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/rivakuluw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tojegilebi.files.wordpress.com/2020/11/introduction_to_java_programming_and_data_structures_comprehensive_version.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 5744 bytes
SHA-256: a5b54b27c422c4b3c16a584b946cd3c4b412ad932230be732d042daf7bc44b8b
font_01_sfnt_off00006c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C36 10352 bytes
SHA-256: 04bd433dfd9cecaeff0cdc5e556d34185c8d219dc1de0d59d5005d77f6e991a3

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