Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6d5974c1b611be…

MALICIOUS

PDF

80.5 KB Created: 2021-09-01 06:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7d337acf25f4ac84fe4cdab4569feabd SHA-1: fd78b162184dad8ddb069645f76ebfa9cc858696 SHA-256: 2e6d5974c1b611beb2a36a43416a0a15366c189f02eac131e85da9c8a946bb59
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other unknown domains, suggesting it functions as a link farm to distribute malicious content. The PDF structure itself appears to be a lure, with the document body being unreadable binary data, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5b71b8b26---18671332618.pdf In PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/5c2adbcf538c81e6b318cccfcadca91e/6389868743.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/navipexofojewevukaj.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/kavab.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/taluniwivawa.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/sudurag.pdfIn PDF document text
    • https://onlinendttraining.net/files/84337378332.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b10cc92c734---fagonizovetoti.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725c7287ea0---dazurinojazenagazumajanok.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231ae6c920---najowumamuvonez.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/voxinuramifeleb.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/zeselodowozajafeso.pdfIn PDF document text
    • http://www.scsk12.org/policy/files/files/90147227540.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/40r9q723h1roubgtq2tt3erp0a/napiwiwotiwovamo.pdfIn PDF document text
    • http://eventechsite.com/files/files/wakotelabodekivaliwedu.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4275693ec5---16303888312.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/42747393611.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/sonuvegusogazed.pdfIn PDF document text
    • https://bloomeng.com/uploads/boxawini.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074934ee5ca9---wejipejonakozufuluzunefez.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/89518864921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=red+spiky+berriesPDF 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_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 10248 bytes
SHA-256: 22843a22023a9a54e93e66126e3fdfdeb55969514ebd72bd37adc3f180c14924
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 18756 bytes
SHA-256: b84c44cfa3558744d52fafd59a3473f025564348728f555cfc4418985252f2a2

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