Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e5e5bdefe2dd33…

MALICIOUS

PDF

75.6 KB Created: 2021-02-28 13:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e130c8af0feb1d2b84b1cd82fd612e67 SHA-1: 5e851151457bf442825b7826a9740f29cb6a2b61 SHA-256: e9e5e5bdefe2dd33bbb3ff70fe0fc224dc2430abcb2f11533de03fc3abf72ac4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=kenmore+water+softener+water+level PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494875/normal_602d476e6f042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_601ac5eca691c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5ff69cc85a6c9.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/bodibetiti-wanowimoni.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/b93d22b.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/hghigeh/game_green_farm_3_hack_android.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/nerusomusoxod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffab4276fa6b.pdfIn PDF document text
    • https://pituxujufu.weebly.com/uploads/1/3/1/8/131856071/86b29.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/iDKihfi/fruit_mania_fairy_rescue_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazutun/87915636757.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/jolizevididesowonajexed.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/platform_as_a_service_microsoft_azure.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/building_android_apps_in_python_using_kivy_with_android_studio_with_pyjnius_plyer_and_buildozer.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/letter_n_worksheets_prek.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_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 5036 bytes
SHA-256: 00b9f017144150460913787a8549c14d4e2b31ce8f81bee0254be7ec56055188
font_01_sfnt_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10540 bytes
SHA-256: 61b067ec81f1c994468df63fdf75361c3d797910c4e8f13c0740ef1e9714c6c9

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