Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea307fb3bcc9cb77…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 03:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4952a39875ea691c8c2ed701bd63cf82 SHA-1: 3519cd064710f5cde3a778e9f77c4083710961be SHA-256: ea307fb3bcc9cb77d010025606d5f123c021f3140fad48b39a0166dcfd5b0760
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://seumenha.ru/strik?utm_term=the+serpent%2527s+shadow+chapter+1+summary PDF link annotation
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/pesubivunase.pdfIn PDF document text
    • http://sudenusona.66ghz.com/tatotufowowipopirude.pdfIn PDF document text
    • https://gaxifuxizuru.weebly.com/uploads/1/3/0/7/130739475/a797831dc1.pdfIn PDF document text
    • https://jumojebanofoz.weebly.com/uploads/1/3/5/3/135302369/weposapekevesi.pdfIn PDF document text
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/260133.pdfIn PDF document text
    • https://rukatopuwor.weebly.com/uploads/1/3/1/1/131164291/kenakebixewov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujesotes.epizy.com/debop.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/photography_portfolio_template_sample.pdfIn PDF document text
    • http://tiriburud.rf.gd/president_infinity_torrent.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/chevy_traverse_2018_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/lytton_report_manchuria.pdfIn PDF document text
    • http://rufazigivemebod.rf.gd/96887171651.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/botswana_public_health_act_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/30825818849.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/retro_game_center_emulator_apk.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_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 5512 bytes
SHA-256: 5d933a112a08940740141af7fbf9d55ae36f285dba32c159622922600c8ba43c
font_01_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 9944 bytes
SHA-256: 14a08bfc614753e41bebf9bbedf044a9b96ea7d6a520340551ba2a5c0bf9fa5d