Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5e46e5042d3bcc…

MALICIOUS

PDF

84.5 KB Created: 2021-09-15 17:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f57ef71596aab7c4c299a735a2443f2e SHA-1: 07fbc0f13967684c77cd55568d14bf40806722ac SHA-256: de5e46e5042d3bccd3794872719e793d58d811b2cb78307c357d6fc9a4a74812
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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.
  • 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://8njl.com/userfiles/files/gogazixopaganutefiviwi.pdf In PDF document text
    • http://mardeestilos.es/fotos/file/46517881849.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e3e41af73---27005524045.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/584d9122f9fe80f7222374c12cf7b643/47821093206.pdfIn PDF document text
    • https://avflash.nl/upload/files/zuruporav.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/nilasogefadenata.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/tukowa.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/18584801830.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/33908800791.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/99619704365.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385ce0f1694---3995734569.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/begemisi.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/pirikezenabimulalod.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/tunenino.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/zopijofumisiwarujifafaj.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/traiotu5hf4j4pr37f9h3njp7q/sonoxeluxuregew.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/sagife.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/5dc29ecd117624f1d7811413da2183f3/46613940831.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/87812489171.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/71776976591.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/28101372281.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/75864242679.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/6965420625.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/nususuwed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lock+android+phone+if+stolenPDF 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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 17620 bytes
SHA-256: a02104afd34bbdfcbeb03a3f6ee897e73460b9e3ca9e38e65d8819ab63dea91d
font_01_sfnt_off000113dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 10768 bytes
SHA-256: 8f40f00d9cc63d30d54c419e13981bd7e978869f9251cd77c4ca71400e49d495

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