Malicious PDF — malware analysis report

Static analysis result for SHA-256 6527627ce6fd0fae…

MALICIOUS

PDF

207.7 KB Created: 2021-06-29 06:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1353d8e77eb05bea1afabaadd102e725 SHA-1: 28cc0d14bf2fa4ee36827c02733a07a9fdfcb50a SHA-256: 6527627ce6fd0fae5a1ac118081f622de722cce98e256133adf7d50c8688326d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a phishing lure, specifically mentioning a 'link farm' and 'SEO redirector' pointing to a compromised WordPress upload. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

Heuristics 7

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://krisoc.ru/uplcv?utm_term=october+31st+2018 PDF link annotation
    • http://lakehighlandsrw.org/clients/863582/File/kelugowurodavotone.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0b0d3a13a---zesanidozujo.pdfIn PDF document text
    • http://www.toptehnik.si/images/vibekibumazibij.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/46572062109.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160862a5831a8a---7347885905.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/rufajisozibejakasune.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/23861058512.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/a4qb2ou1lk8dh6j77dqo6b7vt1/jajobe.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/20555322500.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/puwejeboterijokesan.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd018687c9---wuwatesukodisoguketala.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/26c09ce143665065a189dc39a934c27a/61973927378.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebd3e043e---18907533759.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/vpmr0bo5klf7lihu31bi8105h4/megerogikatenukuk.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9163cd9552279baceffa3256082c0d64/wivowarewemamogufivezopaw.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160791b51c6ff4---dujujokipejigubisa.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/nt1ktn8agprqjg92fkh9u2722k/funulox.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///52619587797.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/guvetomijanomixose.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/zeneloduwajomobisi.pdfIn PDF document text
    • http://jp-cable.com/d/files/gakebeliso.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc91c55fc9---41623149167.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/55363232166.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0756243a---muvelunizavabajotusofara.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a19e4202a---diwiraxasanexadigorofax.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1E1 10656 bytes
SHA-256: 4259fddb4524d8aa39023866e13af281b63c238f9e75a00671725779ccc22d02
font_01_sfnt_off0002ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA86 17704 bytes
SHA-256: e89a77fd015c329e7b383dd66d6b08ddac3d7b626446103b35b177dc574a0b3a
font_02_sfnt_off00031926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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