Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7cc754e84f56eb…

MALICIOUS

PDF

53.3 KB Created: 2020-10-26 02:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: e36f4e8f8a620b3e7531b3275171259a SHA-1: 766fd46db86e991c4c1b1c53983aad646f204c5c SHA-256: 8d7cc754e84f56eb49137c8ae8eb9e8e92b872b9e4c7edbd217489b0e97639d8
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=ntpc+syllabus+pdf+sarkari+result In PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/d30115b7.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/nizibebolutejil_banifu_wavizadarifoko.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/19ddc57ae643e00.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/e093f9.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/sizonifobadinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8eebc575189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8cb7cf738d3.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/tijoxudelozomojuridatozaw.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/25490080908.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/mosotumadixuvunokexid.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/14910105159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5f9448e230ef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f91047dc9e6f.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/bf6056.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/semutivafufavif.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/duvilofogawub.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/merinorasaniv_nidikurawi_ketexirup.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/jaridezasila-vuxomar-botasejafonovug.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000845a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000845a.bin)
    • 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_off0000845a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 5424 bytes
SHA-256: 0c097398e94ea91f73a394179750a86164ac9cd7b5ab6eb831ef3f0586191ee8
font_01_sfnt_off000096d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D1 1936 bytes
SHA-256: 19d579821e83c32cd478aefcb57f849508ece8625c42f2108810477b29a00d2f
font_02_sfnt_off0000a017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA017 11628 bytes
SHA-256: d614bdaca146345ce25b60bbfe44f6de83655be77c6c9bcd6fdf7fb71c968664