Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf2aa9bcec57c54…

MALICIOUS

PDF

92.9 KB Created: 2021-08-13 04:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 61e1154c9c08b322a9dc9e92035491fc SHA-1: 8663fcb6b34fceefb47b07706470b3c41c378822 SHA-256: faf2aa9bcec57c54be8569570d316f30439ae2c622787fdf91172d14f0a5cfb5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, many of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/aklofv85fqrsls87e68t4gqic1/19182200773.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e2b5c40f4b83e76c612a4fa789d89464/wejude.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e13c702170cb305ce4a627c8dadad612/tiborikegokez.pdfIn PDF document text
    • http://myredm.ru/uploads/file/20272149321.pdfIn PDF document text
    • https://giovannicaputoboutique.com/file/61254688255.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16100dde62d94a---98405604011.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/f31279e06b0b7a541d8c67117897db1a/sulowivatofikoz.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdeab303d69---kazazopunelubasizawoforu.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85033ead6---17383493357.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16074592d3b317---gimuxujaxurajo.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/75092996521.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles//files/31287792674.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/lonizozivelibekite.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/lebetumepebuwowafaka.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbb6b88439---68177346020.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/juloje.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/30384962183.pdfIn PDF document text
    • http://lejuriste.ru/files/file/67637318910.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/velofufosepuliwegixuvikab.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ab359124b4af910805e99ead3f52ce2a/79084542420.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/28359705921.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/bff9f4608d94f3a422895c1e36c70bf4/regegapo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2ea6817f329467710d6f5952a08e9223/mefaxejuzopofiwebiv.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/50849969094.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/botepisozanamam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=wondershare+mirrorgo+android+recorderPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 16144 bytes
SHA-256: 676d439e4bece8596dde079767822e0664828b504a5d3d9f8c8ff241775103d7
font_01_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 17264 bytes
SHA-256: acc8017f79970d567366f4d8e066ed55b55dff22ef38f355b2b43f69c839249c
font_02_sfnt_off000133c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 10664 bytes
SHA-256: 096b40ff8a7f5526fecb33cc58a1138f74966ac96739f452ca561b663dd7f540
font_03_sfnt_off00014bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1