Malicious PDF — malware analysis report

Static analysis result for SHA-256 3757322577a53100…

MALICIOUS

PDF

74.0 KB Created: 2021-03-08 00:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0aecf81eebaaa7e174dab36e62463d08 SHA-1: e97d668cbc676b55390a99eb4a59f94b1bd8c83e SHA-256: 3757322577a53100f09d5f1405ac8995010391c75a4e26e262e30ce26ef280a6
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://maypoin.ru/wix?keyword=1+on+1+soccer+heads PDF link annotation
    • http://marafonsport.site/67854373859mjsf6.pdfIn PDF document text
    • http://instapodarok365.site/silasalomvfvi.pdfIn PDF document text
    • http://nasty666.space/fluent_forever_chinesejv0vc.pdfIn PDF document text
    • http://vquest.website/ts_eamcet_allotment_order_2018l0zba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_1cd0d766350444479f58cefacd05f7b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/search_image_google_upload_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/kejasutosalusiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/11635059696.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_a9c4fce93ab747f38d6acf694df168fb.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_d6a322d35aef43ee8681ac9cbbdb1ecb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/excel_ambiguous_name_detected_worksheet_change.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/nature_republic_face_mask_sheet_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/39748484188.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bijli_ki_taar_4k_video_song.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_4c6c11f918dc42ff81c8cb0ab3ef11b9.pdf?index=trueIn 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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 4952 bytes
SHA-256: 475a0ddf6889530c785a8e5efd05908c484aad23009f71164a8d0d0f715cd894
font_01_sfnt_off0000f7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 10412 bytes
SHA-256: 0032358e056e7467b09fd716a851cc83fbe7c949e424a6efb629443a1c754ce3

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