Malicious PDF — malware analysis report

Static analysis result for SHA-256 214255a75390e2fe…

MALICIOUS

PDF

86.3 KB Created: 2021-07-01 20:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 994e8663c144f687e47b22c4acab2e2a SHA-1: 50a07d76e9c1ef4cb7e3528b9dd32e668efb237c SHA-256: 214255a75390e2fead55bcce20fe1be24e88bfcacdc2e14b45981bf31af0825e
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites, acting as a link farm to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/litaxoxemabara.pdf In PDF document text
    • https://nhachoxebus.com/upload/fck/file/vomivip.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c063367f963---94088956994.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072e1fa4b413---gotonuvewifa.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/binotemo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b81283af0e5---84446813509.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/6dc4234b91463bb085994d8fd1714d98/ratej.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e26e1b9be5e8c2299d31923957d9fdfb/66672826053.pdfIn PDF document text
    • http://centrons.com/uploaded/file/164133551460cff5bd4f151.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/punivanosojefujefo.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/patomanopus.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/71557339693.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/lupuzaruzefuku.pdfIn PDF document text
    • http://elitvorota.ru/f/file/10558096318.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c171bab4---jakevijagililawodarabi.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/34809759632.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607199bb93b51---lenaxibox.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8afc26fb---wakumuvetajuwuzaxu.pdfIn PDF document text
    • https://laser123.com/geektic/files/83038761233.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/58285123306.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/jasurevunazagotewemenet.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/49606618993.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5d5adbdf4---70412311783.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c447f005dba---tepefagin.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/19944864884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=10th+tamil+book+cbsePDF 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_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 17256 bytes
SHA-256: 5cd1a64efd3664cf6e5bcbb2627e57e75e3c524ec5a751a4c7a8d37e0457e8b5
font_01_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13396 10600 bytes
SHA-256: e0633680bca460afa10e59d143df2ddcab4cdfa69bb679e745539d1fa4182e01