Malicious PDF — malware analysis report

Static analysis result for SHA-256 83328c7b3351ff56…

MALICIOUS

PDF

72.1 KB Created: 2021-02-26 06:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8b1c9513a6ce22970cc39940e3ce0a3d SHA-1: 35e1e93ca742b2c14513c93030c0ca4ca7e201a4 SHA-256: 83328c7b3351ff56f0e661e7284953458bbe24a39839315b0ef9f0c066cd2ae3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/award?keyword=deputy+executive+director+unicef PDF link annotation
    • http://pressit.fun/can_you_stand_the_rain_instrumentalfvim9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fff77924aae2.pdfIn PDF document text
    • https://tevukebejesa.weebly.com/uploads/1/3/2/6/132695492/e1ef34377db0.pdfIn PDF document text
    • http://x-bionic.shop/xumuvininiloaup2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_6000fbebf3013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_60060ae59d66b.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/WgiDjis/dj_sound_effects_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369318/normal_5fc95455088a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6027e27e0e0af.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/f391f9ee.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/putufik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fefc16048e3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fcaf7959554d.pdfIn PDF document text
    • http://ceter.xyz/fawukajunovibi7bjwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_60361f616cea3.pdfIn PDF document text
    • http://mantenancie.com/catcher_in_the_ryes0ac4.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_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 4960 bytes
SHA-256: dfb39dc09cf9c88eaa3ba4ee153c45cadfe3a6651a39964d7cd3256a02073242
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10280 bytes
SHA-256: 787ae1b3becaf2cff0b10d410cb0770390d115fcbdba9dcc11f478feaa78490d