Malicious PDF — malware analysis report

Static analysis result for SHA-256 97078ddd96955915…

MALICIOUS

PDF

74.1 KB Created: 2021-08-31 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b753c1209f422b67fdee819f4407c277 SHA-1: 43f04fb26fdcdb8808f5a5e06e658ed71d43982c SHA-256: 97078ddd96955915a03d1c96474ae4d3e3a6ee00228f518f9ca7dadfd784adc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a link farm or phishing attempt. The presence of embedded URLs and the nature of the heuristics indicate the document is designed to redirect users to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/9d4ed65b3904681d4a5963a3b69d8d2e/lutowivuxoguputales.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4225f9f5f1---92889190495.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210619180046672.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/fubapimajaxutegapero.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/cmocfj3dk6klbnmc3m7793lvms/fitudupop.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a811d1ad2f5261a2f48341a881d24608/dusebevo.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/tobopokakilotopo.pdfIn PDF document text
    • http://cartopack.com/Images/file/nuzonuvamakukuvefavan.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/52031281513.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/nifimegobivusisuloxezalu.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161007039d36ac---niterifefutifuxavododezo.pdfIn PDF document text
    • https://emenu.hu/editor_up/21855888305.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161007fa128ae3---xusizoma.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/4069292338.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/9587457402.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/kodibokugebalubusometu.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/tefore.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210621_395660961D340C33.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/dajevejalev.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/8505771388.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/c644439408e15ac437419142d956779f/jabutefufutadixu.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/36883205342.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/80249740673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+convert+a+jpg+to+pdfPDF 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_off0000bf72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF72 10760 bytes
SHA-256: 4bafd79fe1500001156e561a5c327c186b0e1b4d651119a9a9b5899f26b289e1
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 16256 bytes
SHA-256: 27fa10029065d093e73beb4475f8870508359e639fe74a411ad9a3962cc75c6c
font_02_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1