Malicious PDF — malware analysis report

Static analysis result for SHA-256 d600170ad9e26b8a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 23:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fe24392d36fd876236f7dbd434cab444 SHA-1: 3ede87c1a7efcc0137b3fedbeb09102e800728a0 SHA-256: d600170ad9e26b8a7d2ff5937f29c1efa30fe4d556940dab3202616dfe2c50fe
172 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded JavaScript and link farm likely serve to redirect the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613878e8aed29---limutolawikazivan.pdf In PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/73517397521.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/tulugategexikojuwojim.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/toxupumopebijativubibelix.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142909b3268e---kajimom.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136817b73087---bogasadakidogugi.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/14517090060.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/84281399812.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/jedilexodujujomivunisa.pdfIn PDF document text
    • http://holzbau-napetschnig.at/99475108433.pdfIn PDF document text
    • http://autovoda.ru/upload/files/38978493888.pdfIn PDF document text
    • http://yanartextil.com/firma/files/razopijefovu.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/xosoriwilidofejad.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/67992624672.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/fakoripofedozosujitoxog.pdfIn PDF document text
    • http://xsteelstock.com/d/files/61962659127.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/lafutiseve.pdfIn PDF document text
    • https://questyme.com/userfiles/file/49371620076.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/xukonagavasefowodaj.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/83673885748.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/79036200447.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/82158567230.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/55101716518.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/rezupezovipubarugizata.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/kjltbl0emkpmu6pbgaevua0dv4/luras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=metal+slug+x+apk+dataPDF 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_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 10440 bytes
SHA-256: 31e485f1c446b9f39acbe9f6caa2806512fc74a7fd731603a05a8c260ec6f6f2
font_02_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 19660 bytes
SHA-256: de4de2e52553ec8a3faaec7ad7003cc3ddd396821c3b68a3f99e5fa7e6c2b94e

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