Malicious PDF — malware analysis report

Static analysis result for SHA-256 28517b73984eb0ed…

MALICIOUS

PDF

84.8 KB Created: 2021-09-10 05:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2aac33389c16b9792b167454d686fdeb SHA-1: 599a79f03d325cbf9c29988acb19387d01a2ca31 SHA-256: 28517b73984eb0edc89f7a9c4d1aeaac5ed21524ad8ad0ebf7cc2dac352270a3
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites and a visual download button lure, indicating an attempt to trick users into downloading further malicious content. The presence of multiple external URIs and the ML classification strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/76521e1eefdc977db507452990f0aa4a/monobepuxifikami.pdf In PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161359f7ecbb45---59617550566.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/64346771154.pdfIn PDF document text
    • http://i-physiology.ru/upload/winofa.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135bd00e7f73---29334723971.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109100929548580.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/23093331797.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gadexezegapotulabij.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/serutafomenipewizofepe.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130465d3ac56---fulajefafafomarexonul.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2b9aee121b63ba2bb7ae73614c6a5caa/loroveru.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/78875287086.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/punekuforivatoj.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/97156418530.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/revurutupifom.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/noramo.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/wexifalotur.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/xetana.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/senikamelis.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/70125018996.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/togagesaja.pdfIn PDF document text
    • http://montesantangelo.it/files/files/62832985636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+conjuring+3+full+movie+online+freePDF 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_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 19080 bytes
SHA-256: 9591a503db636e3afbba632d9e97c7ca3af608d234fa7f2f03444830755a5675
font_02_sfnt_off00012cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAB 10788 bytes
SHA-256: a092db7810b29315b92629542979b06f8d81308414867208d235ac795118ed40

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