Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd16ba1c6802019…

MALICIOUS

PDF

97.4 KB Created: 2021-07-30 08:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98205611f96839af462ef479f61d6908 SHA-1: 89c2317b80601a67fc2bc2086174d70149b86907 SHA-256: 0bd16ba1c680201905791d7bd375a57fa69de3d14fed81317515a38f86e70740
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://bycongroup.com/UserFiles/file/3110119215.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e45d9fab5cede5a3b904203df8c98441/wapirerapisufesiz.pdf
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/45074288572.pdf
    • https://semagro-msw.ru/pics/images/file/fifaliperunela.pdf
    • http://expresskaliski.info/file/vegitukesog.pdf
    • http://namngonviet.com/user-/files/duvonajudoxolafelirumobe.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/maronibekot.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hm47gtvlmnj5ctmqjvtpnrn2p3/8071295257.pdf
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/tuvakidakojo.pdf
    • https://sindonis.com/userfiles/file/61047802548.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160949785b42fb---veraron.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/tovesilelu.pdf
    • http://turagent007.ru/userfiles/file/86300669113.pdf
    • https://keluargamimpi2.com/contents//files/22738353274.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/007ba22c27eca2dad06f92ca57ac6fdc/kuxanexilawulufixov.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607926eeccff9---67145791259.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/m9s9i5fudouo7eld23k0l327oh/nijalozakopitabixobo.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073c90be73a5---48179852060.pdf
    • http://cwesp.biz/upload/file/fixikuvoduja.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/e28jmtlqgbu0f8dn82ho4ovm62/23378289751.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d6938ac9---77942559780.pdf
    • https://asiahijau.com/contents//files/fuxixeridadum.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/l7a6dkrfthuq0j4juloco7k3o0/zeguganelodelezatuvex.pdf
    • https://energooptima.hu/upload/File/rukulakeloke.pdf
    • https://himarco.ir/basefile/himarcoir/files/nexosajoduxiwugatujukes.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=miraculous+ladybug+season+4+episode+2+release+date+in+english
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd29.bin
8e8a092e8af1fc7865bea808524e157a322cb113490762df22234eac747ed9ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 16340 bytes
font_01_sfnt_off0001137b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 16792 bytes
font_02_sfnt_off00012b92.bin
1886a318f2e22e9b18007b2c1f61446de455fcab352713191482ff0b81e88d9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B92 11340 bytes
font_03_sfnt_off000145e2.bin
0142b75bb789d2d3ccf5fbbca3d6a8e575b43e5c076a24261d63ce8b06962b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x145E2 18444 bytes