Malicious PDF — malware analysis report

Static analysis result for SHA-256 642065dc1d003456…

MALICIOUS

PDF

87.0 KB Created: 2021-07-04 05:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ba3ab9d7c59c0e09d17a4279d91c08e SHA-1: 5e2082e7dec0786026bc58c9e9a31f6272d78e7b SHA-256: 642065dc1d003456fe87099b0da477e927eabab7e34b78ba9df1c95c79ab7599
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the conclusion that the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://crysiq.ru/uplcv?utm_term=how+to+make+absinthe+in+doodle+god
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609abc0771d0a---fusadumupanabuwozeb.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/35ac61c06753acef2a153689cf1d27f3/70936795022.pdf
    • http://hzzxtl.com/UploadFile/file/20210623105407553.pdf
    • http://ahxxzx.com/userfiles/202105/file/japusogowetowonawubivo.pdf
    • http://roland-toys.eu/userfiles/file/povonulip.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc1a9be01a---sikekesu.pdf
    • http://autoscuolapezzano.it/userfiles/files/56127927329.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b5929fb7f---lawawajukajevapo.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/7b99e9e8ac3cc50fe90c41cb96619e10/63043142756.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb0d2255e---rasojoboxikej.pdf
    • http://isdoor.ru/uploads/files/49962481675.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/okm6k3k3temmnnoqerosvu5f82/dasewezawugika.pdf
    • https://healthmatters.me/userfiles/file/zuxekezem.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e926b06112d45cb9b185f390709aafe0/92486213581.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/abeb9706f1e860a4bcfe15a18be48f0f/jafobilajoxinipejite.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ea4b67e11---womozizof.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/352632a881d22273664c155d6e846be6/98876913525.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ba55b85ce09a142905c1e57551f4cc00/womujesiziwu.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c81237d744---megufifesesugenivozifite.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/42817707860d558a8dd2f2.pdf
    • https://moveo-sport.pl/userfiles/file/92917612769.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7888ffae---1146955701.pdf
    • https://socohoteldanang.com/uploads/image/files/fixofupu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea38.bin
065ef73c7d4fdd6507d0dc2d29d2c03d82e79ccafe6643f1e07605899ba9dfc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 10904 bytes
font_01_sfnt_off00010305.bin
8d3294e59b8815676e90c7f78d0f8c8dfe9566f09508df13c81d44ce1583da3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 19960 bytes
font_02_sfnt_off0001365a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1365A 16792 bytes