Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45296dabc32de78…

MALICIOUS

PDF

78.9 KB Created: 2021-09-06 19:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 98e343b1740617c977c9274d55feeb8a SHA-1: 0bc478059825e8719a204b20e4c39c7038c16c95 SHA-256: f45296dabc32de781fda5a6820f76237ae642920c946855cb07efd4f171b7f02
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/cfbf6ac7756590838e4411c8e743c9ab/20669035157.pdf In PDF document text
    • http://nature-revive.org/files/file/kozarafodojusisojujew.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/82556803223.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b7dd07c6968a543a6b87d912c98bd12/sorunisesulagowob.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/54947226440.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/95640252722.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075344555333.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a175d39bcd2---46285009122.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/293dcd13e1a796f2274120b6a794afcd/tenonikuvakivulabulidubaj.pdfIn PDF document text
    • http://gyobel.itpublic/file/savigemumison.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/88851018778.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/mivanuwesinu.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/35975327398.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/15726741191.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/75128371471.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/fc19bf49f9d78ca021c4f68f18549299/dajagurunomoxi.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///bawogunovojagiv.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072583b74670---44254452859.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/hai0ojkk5c697jih58al2o9215/243287399.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/zikaxusetukirusog.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/vujemaropejepenatizaveke.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/c7be2033bc791b789da45aeecf079e6a/16717574528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=speakout+pre+intermediate+dvd+worksheetsPDF 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_off0000cb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB77 11028 bytes
SHA-256: 76a0a007dad2dce10bc6e0fbc202a9f0dc554bf4ef2d4410495ffad1d230729e
font_01_sfnt_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 18148 bytes
SHA-256: 8801913e620c1b87b6869b15dcf91136894b4394d95c3675957cc52dac3fc87b
font_02_sfnt_off00011433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1