Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee1481d8a2aa21c…

MALICIOUS

PDF

83.4 KB Created: 2021-07-04 07:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d5c0cf684e6bf0bebd6a1e17ee3a514 SHA-1: 49231d8faa129430204b80c98ecadb64d4d41f00 SHA-256: fee1481d8a2aa21c410c048fd479462a5b6f47787f9cbd347a4192fe70a779ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress sites, suggesting an attempt to leverage these platforms for distributing malicious content or conducting phishing attacks. The PDF itself does not contain readable content, but its structure and the nature of the linked URLs strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bidwoodmachine.com/d/files/89173771025.pdf
    • http://essuances.com/ckfinder/userfiles/files/fetidivid.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0421ab706---fidigituwaxax.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c527dd5940e---38634921713.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d60294b87---ripugiwugifiv.pdf
    • https://alakharia.com/public_html/userfiles/file/bumimuxipubirotuledab.pdf
    • https://amthanhanhsangchinhhang.vn/upload/files/42523081272.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/254816ec76813dd5a34897e2d13fa142/xevesezaxo.pdf
    • https://cplastik.cz/data/cms/file/32180932512.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fjp5b71gav32v4snsdvbctub3d/33650312613.pdf
    • http://aucoindeshalles.com/menu/file/47598131919.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/31dc6d6a7191d538f65580de78d3f298/nekajimunugovovipixubozax.pdf
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/wovuli.pdf
    • https://efnnma.org/files/file/46131007007.pdf
    • http://toyteepee.com/uploadfiles/file/210522103029807783ha00ep.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160967ad279446---13321325080.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a4e453d56---pamizurunus.pdf
    • https://adepotcustom.com/UploadFiles/file/20210621115116152.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/db29307ffaa91d0b6d45f645848542b3/nijewav.pdf
    • http://karimeh.com/public/userfiles/file/78747922837.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e83dca759be29035a3d61667ead7f093/zitewunakamerabepiwul.pdf
    • https://indolabtek.com/Uploads/userfiles/files/74176440984.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca560a8ee---19943882465.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=morgan+county+drivers+license+renewal+online
    • 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_off0000e1d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 16792 bytes
font_01_sfnt_off0000f9e4.bin
31580eb87acf16409ef0828b3edcb90f92357fb149a54ad4774fdc0f75ec4713
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 17124 bytes
font_02_sfnt_off000126c9.bin
0a2ffe3189e20990ef42598aaf9317dee6e086f7499ee9df9b5ff6bf5ec20dda
pdf-font-stream PDF embedded font (sfnt) at offset 0x126C9 10904 bytes