Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9d919aac8f86c0…

MALICIOUS

PDF

72.4 KB Created: 2021-03-05 14:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 74c40cb96e6a0408485da37f3d08288d SHA-1: c3ca72db3ad1e19345eb80931d0f526bd4ee2d43 SHA-256: ab9d919aac8f86c071a3bbfcb79c9acbd223142f17deeec7ac5f8246e967c608
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an SEO redirector for phishing, specifically a 'free-download phishing' lure. The embedded URL, https://mezovuduw.ru/wix?keyword=kenneth+e+hagin+books+pdf+right+and+wrong+thinking, is the primary indicator of this malicious redirection. ML classification and ClamAV also strongly indicate maliciousness, consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=kenneth+e+hagin+books+pdf+right+and+wrong+thinking PDF link annotation
    • https://cdn.sqhk.co/wozejodes/eigUmuK/groupme_icon_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/2xN9TQb/boo_monsters_inc_halloween_costume_toddler.pdfIn PDF document text
    • http://mugaset.22web.org/gixixusiku.pdfIn PDF document text
    • http://mozodulo.iblogger.org/scratch_2._0_project.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/bc432ca3-4c88-4445-ae26-7fadd025c6dd/99421454269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b8900a-4e38-433e-a2d6-035d09435c87/hp_officejet_7110_wide_format_a3_printer_specification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f7e4e0-a6e2-4a9e-9ff1-514ed5dfb1fc/why_is_he_suddenly_quiet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f715fe-4461-4b6e-a125-5d24932b316f/nupezizok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd37ce6-8410-4679-8f20-84986c0719fb/harry_potter_und_der_stein_der_weisen_buch_carlsen_verlag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68aeeda-733e-4cfd-9ad2-b10282c8c8a0/instructions_for_delonghi_oil_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6023f2ed-46ab-470c-8893-e1f6a186c312/36505653238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5695f68-73ca-4ca5-8593-5ad5b62559bf/68198286040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d35f2f9-0e6a-4efb-9c05-bfc71dc56206/how_do_i_change_my_wireless_password_centurylink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab87354-3f01-4be5-ab1d-21a2bf84f4cb/kutezepifeweba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92eef5b2-a991-4065-b7d1-846c010b6a0f/xurisekikar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fe168d-a453-4866-be39-026833b61350/peter_drucker_leadership_theory.pdfIn PDF document text
    • http://biwomilorawud.rf.gd/wesojosakugezadixovotoze.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_off0000dfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC9 5536 bytes
SHA-256: b8c6f629fb5feba5a2e96cc61aafd44c6b9d68a93423c8476c18381369cdf794
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 9776 bytes
SHA-256: 2a48ad8b9fca2e9dd66cb5e9fbd6178eca0d0430ec39f7c1a986b9e0ec56c0b3

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