Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ac6b14d73da40a…

MALICIOUS

PDF

85.9 KB Created: 2021-08-16 04:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ee7c41b4bd9b16c3434c6ff05208f89b SHA-1: 84cd0745531f86aa397c2f7c1a0cf83601479a30 SHA-256: 17ac6b14d73da40a870712dbc6027202a973c8903c3e9b15a00da9f0ff0c99c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many hosted on compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The file likely serves as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://allytemp.ru/uplcv?utm_term=a+aa+telugu+movie+hd+free+download PDF link annotation
    • http://abwalabamaave.com/uploads/files/52253630241.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/96843512864.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/gununesesejamedobaxovogo.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/eaf5f300f5c4b20054037a50f2d1c923/20888064045.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/junomutojiwakabanujetixi.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/simavi.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dd7d2b308---pafuxuxazufu.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aaeabe3eb---bujefupubukiwilodavolugeb.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/46772878997.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/fezatesuboro.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096310a65b42---13202795595.pdfIn PDF document text
    • http://praguetransfer.com/files/file/zesiganofuwonexekenevi.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1arivq0miklof5m85g8rlnaeg0/8382746126.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8cfe4b842f8e93b1b5c486b717826f21/36192854366.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/94892759950.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c635cece9e---33932675049.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/32757483015.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/3275776162.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dc28c01e2---8378920752.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/59921689161.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/mufubeluze.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/19929730373.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/fagerosexoli.pdfIn PDF document text
    • https://www.shinoda-usa.com/ckfinder/userfiles/files/7118247339.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/xumipileripasuwuwofofokid.pdfIn PDF document text
    • 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_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 16816 bytes
SHA-256: d912ca2ee9deaf99a1a5351b25287178c70960ea71a5dce36eeed0456f6c7351
font_02_sfnt_off0001309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309F 10864 bytes
SHA-256: 804475a91132041947627d718c38ff3ba07825f81977df234ae1477aede80984