Malicious PDF — malware analysis report

Static analysis result for SHA-256 e905857543886703…

MALICIOUS

PDF

48.2 KB Created: 2020-10-25 07:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 5deb98e394150cfbc03e78bec0679bb8 SHA-1: bb903af8f227d59db2d0969157162f04619a3e6d SHA-256: e905857543886703d85c8a081278d62e59f8d55c46052b9cf05f4ead07a54914
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://ttraff.ru/123?keyword=unscramble+sentences+worksheets+elementary In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/nabelebefawedamal.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/vibukopexeb-nolaniji-kulibo.pdfIn PDF document text
    • https://nozudasukexip.weebly.com/uploads/1/3/4/4/134441991/pegogib-modasofoduzis.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/jilumoxe.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/6283841.pdfIn PDF document text
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/4331676.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/2258d9a316.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/duvedeliweg-sogegotosufenid-wegegazo-xofavipawutufen.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/bewezefimob-gonuwigaxazet-suduwusozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7593/files/kahoot_smasher_extension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7643/9198/files/27358004835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5091/6761/files/gisoxumugajaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0031/4039/files/les_figures_de_style_1_bac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/computerised_accounting_with_tally_calicut_university.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/49215015390.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/17675747782.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/69701151288.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/saxon_algebra_2_test_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8c48fd-b609-4de3-8180-92ec87acdd56/85123863833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46127aad-13f1-4539-91e6-3efb86c8ca24/desutulituxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673ed0e1-7ecc-4e01-9cd6-84acf2695015/95133061582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3170d498-9ca6-4f68-932c-fcb7d1e81e6c/23373550853.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/52613607880.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/sifuxavazozojegazizi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/212282414.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/agastya_samhita_in_english.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_off00007c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 5428 bytes
SHA-256: 46c6865333677a34008dff1f2e7ae73c40a356f06ef7030e21680970f3ea0020
font_01_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 10672 bytes
SHA-256: 368b912c094f41d5773b3badbb7d34b404034f2a11e74a196b3e785e4b9a41aa