Malicious PDF — malware analysis report

Static analysis result for SHA-256 814560076b8f7680…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 21:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ac98141062ac28b684598a3e9c47477 SHA-1: dad9f73a14c8bdccb9d54f2d435a771bf9d932b4 SHA-256: 814560076b8f76808b68f9e402931332a4cd6e6a5cfe6d28bbf7fad9bbdb69bb
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are flagged as compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with known phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://tunesistudio.eu/userfiles/files/dixezelepopafi.pdf In PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbe0681572---66983614955.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/vuwarejudufig.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/xowimoreti.pdfIn PDF document text
    • https://506hlapeta.com/files/file/guzefen.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109031212484174.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/17189851828.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/91529361840.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/68144526938.pdfIn PDF document text
    • http://fitviewer.com/files/file/84535523683.pdfIn PDF document text
    • https://istanajp.net/contents/files/jokidetasidipix.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/84404630268.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1db6af87---8659560945.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/tidivefofadowozolesif.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e13513cbd2---vekejojawunozibideru.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/67907731761.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///vexavasatus.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/86053234444.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/nadawigoserelijokenixur.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/24870067702.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/sagafugutozerumas.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/pirovidoputak.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/29609405371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=brutus+password+cracker+androidPDF 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_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 10792 bytes
SHA-256: 161c435d74a77225de2dd420dd9e661abcaed16311692795f7be03b135e68709
font_02_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 18072 bytes
SHA-256: 8404333f18136b2cd73b3b59f95619591c301f217b8c56983e41e61f235d2c64

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