Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59872802a6b90a6…

MALICIOUS

PDF

70.8 KB Created: 2021-03-29 17:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f2fb9ca6779942c1b6e9f051104fd26d SHA-1: b31817e9d54579e1ec92611efdfbe1138f0506fd SHA-256: a59872802a6b90a64a7eb3f1276c764888c7bf3e70930e80a4d994b3430491ec
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic indicating it is a lure for free downloads and includes an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, appears to be related to a 'trophy guide', likely a pretext to encourage clicks. The primary IOC is the redirector URL which is likely used to host a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/wix?keyword=we+are+the+dwarves+ps4+trophy+guide PDF link annotation
    • http://xizerunax.scienceontheweb.net/caranx_hippos.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/words_per_minute_reading_grade_level.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/88030354501.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/rotodenowomadumuzetop.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/61747988935.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/11978446444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_60220fbf232e9.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/61739999911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_5fe18ad4d3f54.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/mastering_html_css_and_javascript.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/kodav.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/67465733049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c76c893-45b1-4c07-9e91-190fbe5f3e80/will_there_be_a_season_two_of_alex_rider.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/25827245047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4152608-1d81-4264-8811-8e13682f5b0c/dosugodiga.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/strategy_games_mobile_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/mijosukuwef.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/20042568990.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/the_soul_of_an_octopus_sparknotes.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_off0000d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 5544 bytes
SHA-256: 131196a87904293064cc8ba266e37b660eba6503da739df65b615bab4c5bbbe2
font_01_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 10856 bytes
SHA-256: ee4ffef77caad372c4b0d37c97f9ed69ff12ba37b0607cb805670468ac0f45ba

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