Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0e3d52197b6643…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 20:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fce0d5fe88044c83af6b41de379756f8 SHA-1: 301444e4c9a8ffae1860422fb5c3fa5681ff7edc SHA-256: 7e0e3d52197b664375060109e44712dcd0133461dd1849d2207ab629ebd0b3b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://littlepearlbooks.in/data/eimages/file/20768538573.pdf In PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160909e6645495---21904529069.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/mabinilezudixif.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/63387f1612b86c59ed6af4e44fa99e02/merix.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072903572922---gelasupotebu.pdfIn PDF document text
    • http://elitvorota.ru/f/file/puwimivijoxunekimiw.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/63639482238.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/91354244015.pdfIn PDF document text
    • https://tekartltd.com/upload/files/tajukubir.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800b968fb62---libawoluvipeduvemukadula.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/85344392784.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021062011514034.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071e89a6579e---53883795709.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421113ed7e---pakajumuwasorulel.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874a35db5fb---92177392365.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/63305457981.pdfIn PDF document text
    • https://equinox-e.com/upload/files/80720913338.pdfIn PDF document text
    • https://orcasproje.com/userfiles/file/dedom.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab61dcb406---52127407280.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ma7qvotj8nregeibbehivg5cjg/jigaporafe.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/9tu2nj49v4482p3tnrqe714i2h/60427066854.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/zutinerixilimew.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/dinubapemigi.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/vepomevubogejik.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608599744ba8b---95922179300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=core+muscles+anatomy+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_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 10936 bytes
SHA-256: df23f8fb2c881fcf32bccfc5334246fc3424b2b3b12378bf05b38eee502a72b2
font_01_sfnt_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 17568 bytes
SHA-256: 0879eb9c3878d835893987c863bafea3cd10c835072d865cbcb2443a0b2812e3
font_02_sfnt_off0001195b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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