Malicious PDF — malware analysis report

Static analysis result for SHA-256 3656d4a38e0eb1fd…

MALICIOUS

PDF

66.6 KB Created: 2021-02-13 01:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b33a0d8f7242657773bc4ccde0915e23 SHA-1: e1b6cd04f104365f1fde8e98acad381b677c4bb3 SHA-256: 3656d4a38e0eb1fd1d3d2dfa39d80034c94df179285e798ad6c111eba0611b4c
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=pokemon+moon+official+guide+pdf In PDF document text
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/xufiwidivevota_wavozewet_sogidilaneli_mopedatofosazu.pdfIn PDF document text
    • http://infonewstravel.com/jatefafowevuwijapux7mab.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/e52227c6.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/5571681.pdfIn PDF document text
    • http://easy-money-cash.space/guide_to_fill_citizenship_application_form7q9yn.pdfIn PDF document text
    • http://chambre.xyz/48335224824hhyy2.pdfIn PDF document text
    • http://discount50it.pro/livadurafew6hy2p.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/tibanepoxilibud/algology_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/authenticity_certificate_artwork_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/41279415138.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/immune_thrombocytopenia_practice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/zukenapubugugakisife.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/quickbooks_balance_sheet_accounts_not_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/60536271675.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_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 5264 bytes
SHA-256: 9defcf85dd1baafa55655c12fbdd3664e0c99cb76057e53859788860f23a637a
font_01_sfnt_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 9828 bytes
SHA-256: 2b42f543378af17f55d645681b69149e0405b589897bcab3a945454ecde97cc8

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