Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e6855dcbda15f9…

MALICIOUS

PDF

85.6 KB Created: 2021-09-06 11:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 897a415f21d62a156a28668fc65feca4 SHA-1: ed264f63267b338c5dcdede777fd2c8c63022d16 SHA-256: 04e6855dcbda15f9e02c9fbe8f80188510a4554848c8714d481de18bd5510e17
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or redirect them to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/cqa60711e67uotcvc04r7m7ev2/rageriri.pdf In PDF document text
    • https://bawwabatrizq.com/userfiles/file/16842536944.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/28311780199.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/43066476685.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/tilubejimavinodutiwesugor.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/bvl45uduqia83m17dllaqar8o4/ponesodokuzosilesanu.pdfIn PDF document text
    • http://ping-property.com/user_img/files/55863403310.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/94447928258.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/94530891510.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/90073596441.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/pibaxudazununaxozep.pdfIn PDF document text
    • http://thefencedocumentary.ca/adminfiles/file/ludek.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a971018ed32---42002036659.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/54656984677.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/7118601067.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6c5f00dff---70536444869.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/93620518811.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/85030966388.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/78802321715.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/19540990966.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/65073163882.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/58653915554.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/volodegibojatitijifavedo.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c9bbe6837---38378445192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=peripheral+arterial+disease+guidelines+2016+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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 18044 bytes
SHA-256: 539b72ddb5e4d43709038262547873059060b06614347db63f965a2ac4b4240d
font_01_sfnt_off00011622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 11220 bytes
SHA-256: 03fb67adac7cd4aa378549576ba095bd0e0b45e430522841e92957e9ceb534c2
font_02_sfnt_off00013039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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