Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f2fe6e069aafa0…

MALICIOUS

PDF

87.1 KB Created: 2021-07-22 22:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 842096a66b22ec3d801e86c13089f967 SHA-1: 8232a0f30cd08a4bab030b3f2d9d44efb913a210 SHA-256: f4f2fe6e069aafa0ad8644c2d3ced2a8abdc9a2e2fb35867b34f62feef6c6f52
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The embedded URLs, such as 'https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=genshin+impact+download+apk+android', indicate a lure related to downloading a game. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4f5d471d99bf6bccb356f315c5c0a878/78193539911.pdf In PDF document text
    • http://come2menorca.com/images/file/xijedopaniponokudotis.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/rokewujemobuwasifevin.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16242438155379.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085df80c8d6c---nuwilewezevixo.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/mikoxarawavodelowevusum.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/80205726185.pdfIn PDF document text
    • https://afayl.com/userfiles/file/kijanilunidubimuteze.pdfIn PDF document text
    • https://designclarf.it/file/xolikutinidepidaz.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/48621479271.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e703d6b95---pogofuzaxivirexaxu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/n58v7neccoqg7dgnrb2nb7uvbs/gisosog.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/togikofuguzeroxin.pdfIn PDF document text
    • https://www.elguantedeoro.es//ckfinder/userfiles/files/15416447477.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/zeluv.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/97400371115.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0c7f4e88b---duvubuvomiri.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6ad5475de---torumofovul.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7f2aa3d403dea94aad52722ce92ca515/xikerubopaduk.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a597aaa78836e3c55034215d033f20f0/66496593256.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/fupegiwekewanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=genshin+impact+download+apk+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 10996 bytes
SHA-256: 11daa293a6e61f3ceedf512ef7214e354507677c232121f91a0b1c7789db027e
font_01_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 17552 bytes
SHA-256: 502227cd8fcf05e793b291209abe26e631034062ca63b08a17730a3da67a401c
font_02_sfnt_off00013636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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