Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9765466b4eb669e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-10 02:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3a8df480554ae9ec0a981ef1f910b0d0 SHA-1: 9260e2d8b088df6c9d036540811fe19a889a7e3a SHA-256: e9765466b4eb669e6a59dc7a53cb3f97a4b349cc1362a48b5f1cdcf9e9fd0a25
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of 'cmdd07' in the document text, alongside URLs, hints at potential command execution or exploitation vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://vizesblokk.hu/files/file/xanagazidejewab.pdf In PDF document text
    • https://jamurgoreng.net/contents//files/91231767531.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0a231595---5321815378.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb82727f43---gesafajivivulabiwi.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/92973807296.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/511ffe7477139f822836333e71520437/wukadarisapikewimese.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/febekogedofosujamobiw.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874719728c1---xasozodazesutevusa.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/72472757214.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072032a9e30d---63009352949.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e9d015064---61456023998.pdfIn PDF document text
    • http://atrsara.ir/resource/files/53921290328.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/0fffviomk7s38tuecfnrcbmh7l/xigumotadifir.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/v1582aeadinnc3k7uas0cmdd07/30845170827.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/zizonos.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f07bde32640362a237c803c933326844/90296958155.pdfIn macro / runtime command snippet
    • http://thesecurityguardunion.ca/userfiles/files/reduwaxupeku.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e243aaa1a33---99180800162.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s36kv39pte2nckp1i7ph1e6nn6/50791502467.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/94628924036.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/sevibativijisu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3894ee4e.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4a304d758---kijigukuxixokimatabegi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ljbmdak59pakgecbv79fgpg046/veromexeruboduf.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42723eab78---pajasurudawutanipalitinu.pdfIn PDF document text
    • http://lmleadmanagement.com/userfilesIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=object+oriented+programming+using+c%2B%2B+pdfPDF 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_off0000ed69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 17296 bytes
SHA-256: 481bb5b7a61aa7c874d89cf8001366b7104d72f3ece1d3cd44f69fbcd4a2ba52
font_01_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 11312 bytes
SHA-256: 0f4cfd843e47ebc8b5dc0567cc5a17864788f6fe83c79b62db62544c0c107ca7
font_02_sfnt_off00013545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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