Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebb40552df473f…

MALICIOUS

PDF

94.1 KB Created: 2021-07-03 23:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06bf1b70db591a85f951a7ca6d327738 SHA-1: 557491fb309b47cf6a17bd04f7a9e83e07f3cf56 SHA-256: 85ebb40552df473fa6938c027601c6d7c29455291e6cf8aac05cf6a385c09fb8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to distribute malicious PDFs. The document's structure and heuristic firings strongly suggest a phishing attempt designed to trick users into believing they are receiving a prize or parcel notification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1f83ce5877aca95751e82a22637ba34f/xolewigovuxileluxubawozuz.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805f39f1623---25010118643.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d1a3e448---gamupizo.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ta7cnpcsl80a1tqa6cbngeijt1/nefotowupijovepopulusa.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4f76bf382---13232525621.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16097a38800976---26100246222.pdf
    • http://dioceseofniranam.org/userfiles/file/moraxijewajunorofe.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/25s0eiv5f10l0uhrteck98b1f0/vuxoxitenabonulawutipu.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608facebdc5a4---30533253148.pdf
    • https://people11people.gr/uploads/File/13941069574.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e625b72a93---vofetipaxiwidiwora.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b760f2b0e0d6f44a0730788954615d57/zevetesomutewinoso.pdf
    • https://boucherienabli.com/uploads/FCK_files/file/vadejosakowewuvujuzuzifu.pdf
    • http://jevades.com/aircraft/fckimages/file/givigenet.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d393498d7a8---vujegiz.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zokupirurasonub.pdf
    • http://cc-loges.com/uploads/file/80401719233.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/relafebuwugi.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d7c2c7934---tezowiguwawil.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9876a0faa923bb3a2a16364bc4302e14/lovegagizovabotuzuxatak.pdf
    • https://memoservicesrl.it/file/nojivimazu.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/062469860c1fd7d1c3179484df89e9be/fegizikumefodunuga.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839a305a544---23226647018.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb4da1da8---tokisubigi.pdf
    • https://partnyor.az/userfiles/file/6850275473.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fixed+income+instruments+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f576.bin
b496ada458111230c4962ee97ed68df153009fbd4c520af1873db65f548d89ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 17648 bytes
font_01_sfnt_off000123d4.bin
bf3ac2bbc5511ca59b022801f68684aa2b8ae7661b1a55c6866fed5ae8d27d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D4 16232 bytes
font_02_sfnt_off000139b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139B6 16792 bytes
font_03_sfnt_off000151cd.bin
2943c70c8e52fa635c6e57f05516295a367dd9586050d8821c46dd0e5b1d1489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151CD 10752 bytes

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