Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd30eb9da49f73f…

MALICIOUS

PDF

105.8 KB Created: 2021-07-22 19:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d2dbbca9ce5c9e3170a4c96a794371dd SHA-1: 543e081bd2ce4ad25673cfabf5d71202c6aa1042 SHA-256: 9fd30eb9da49f73fe1bdf5cf489b146479849503765362aabbf4d5efb6d02c9c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 http://animationcoach.com/userfiles/file/nurowiwuxuj.pdf In PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/c8a3e49f05d92802906f03922d811113/doriwupebibilala.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/60183545292.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/77406621022.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098333a2351d---58855518850.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607743096b387---modilutimagekuwetofitokak.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/99704495620.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/paraxusuguralonaxaxadovog.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/8213263441.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa2f3f1b21---topevaxuxagizovak.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/88854855616.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071651a01e57---14648624288.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/345de15c13ab57c3bb76e2764877f8bb/77015609265.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/guu0fro8som56digluqlk9g3q3/19172477086.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/50695440468.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f2832b93f---16273374586.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6da93cdd1cc394f154e0982015eed6a4/xuduwe.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/25bc88ae5fd769646a6d7305ab35a998/konazexuxitirose.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6769b1b2---juvamexalivomo.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/29726153895.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0c017d551e---50903362458.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///30948859993.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/rasen.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/zutamega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+reyes+mean+in+spanishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000fc5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFC5F 18756 bytes
SHA-256: 83f359d05c6e79675313807e37e9fb52371bebdcfa1d3a22bca29a16987b8055
font_01_sfnt_off00011b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B45 10720 bytes
SHA-256: 4eede583e27075ad0bb147feeb76637a6760d3985af53b11c09325043696c310
font_02_sfnt_off000133c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C0 24316 bytes
SHA-256: d7d59aa3b00b5f989adee0c1824a19670bbfe7d188fa2aefade37caba4fabddb
font_03_sfnt_off00016e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8E 4104 bytes
SHA-256: fd23451c13914d3482cbc5af8b552943cde980cac5fb03293d62f11b53e458ce
font_04_sfnt_off00017db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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