Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea2fc8e0a6a5d56…

MALICIOUS

PDF

87.4 KB Created: 2021-08-04 11:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: b164b8782d19033d6967d0693a578cb6 SHA-1: 97ee07beec961b00071d951fde2c68fc2b48a082 SHA-256: fea2fc8e0a6a5d56eaa4f5aa0ebc745a7e54a4983d9c24c06aaaa6da86b9a7bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://raegcafe.com/uploads/files/47111215115.pdf In PDF document text
    • http://kapli74.ru/upload_picture/69320228624.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/3de90ff150ae970b1ec0570573813b69/tatefotetesisev.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/100545374539.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/23844944522.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160af787c5815b---warotujowow.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5524d006ce---9282326579.pdfIn PDF document text
    • http://debten.net/UserFiles/File/tanof.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/90410748601.pdfIn PDF document text
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/xaburotunirifitobajirewu.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/zebabip.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/bawugupetenosefabo.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///74719190825.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/gogetarujirifefifa.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712f583627a---1900478725.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/pevupamodosedopixetixanar.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/hsodfss6ihro8p41qm005rq4td2qmfkq/pesexavujajamot.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9755f2ebcb---83649957679.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1532cd4c68---89805758114.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/fipido.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/13975814051.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kinafalavefejadas.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0e433dc6---juteregufajowop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=appsc+group+2+previous+question+papers+pdf+free+downloadPDF 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_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 17400 bytes
SHA-256: 3a98855aadebb89359118ac108b3fc5a944ce3d4085b17e3c5b652041533829a
font_02_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 11296 bytes
SHA-256: f25c659bb36bb3e4a0fc78d54515e430c7053044eefb9125924892486d8d99aa