Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6ba09c1d2dc27f…

MALICIOUS

PDF

85.2 KB Created: 2021-07-31 01:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b967abaead4cf86447603b953b0db685 SHA-1: bfcb65c92093f14f63686b0691699d45fff6859c SHA-256: 8b6ba09c1d2dc27f6a01cab4337f3c7efa8da41b1dc11b5fee6c5422950d11de
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. It functions as a link farm, directing users to multiple compromised websites that host further PDF files, suggesting a multi-stage attack. The presence of numerous links to potentially compromised CMS upload storage and disposable hosting reinforces its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://hanahana.vn/media/ftp/file/nidawavivufoxinevewumene.pdf In PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/90d5d46990579b2826c90cf35af5fdc4/tivetisomutinejisawesiw.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/q3bhghdpisclddinpka1orsv99/runevopitufepi.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f35aa472---jukimesigagirovavoza.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f0a70d1884db12ee770d445a9e15b05a/dawuwaxavexefad.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ig3d8ejclqbmjkmnn8p1lu1b94/fukiko.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a896bc1e755---pofesobo.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/62784802bcef8b9eff24300fb3b3ad43/xoloxodunozupi.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/31966478098.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc2b9dc6d---fidovesasodeweludapisulop.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/3821786065.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/rurexi.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/59dcee44d1f962ad000602c8546071c7/33798754470.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab944a483ba---38252848710.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160821d1fe22c3---ruzetesifajenitokem.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/43935663143.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/e00d7e0d98307c6141f4903e7c7ec407/kijikofumij.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/gepazuruguwido.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/40948348764.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/11cvq68tr834s2qqjsjbevh3l2/39838113250.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/42141361623.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3da0f05020---98799811910.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082ec242a3fb---xekugakitifimomew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=who+guideline+diarrheaPDF 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_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 16328 bytes
SHA-256: ad0e3ba6c602b60e44ad44a418baf578b29297b713fb13f76053089fe04821df
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 10356 bytes
SHA-256: 9e1b2fa724225395ce5500068b50bbb6ae4d132c94506ba83b0d3a4b925e6414
font_02_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.