Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee69b9d7a8a0ff0d…

MALICIOUS

PDF

79.0 KB Created: 2021-09-04 00:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2fc824cfc84175c6d235cf80a430a8cd SHA-1: 299e9da9979cb0317b79639029c0125be500d6b0 SHA-256: ee69b9d7a8a0ff0d4465a401ef05c70882e9bb7e0ae122900e8907039e94cbc8
196 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of 'cmD�$' in the document text hints at command execution, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/a0d0rv5p4a544a8rqbha5u3ug6/paburuvovepato.pdf In PDF document text
    • http://noithatmfc.com/media/ftp/file/96995577537.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/18949786938.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080c70d299d1---sikuvegebomurigowe.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611df93a580bb---65851681315.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab934627d83---79867782071.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210609_022735.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0a0de1adb---xijifulipitori.pdfIn PDF document text
    • http://teplospectr.ru/images/files/34120365776.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/99732572990.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/36787753928.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/58179704260.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ea1ea4cd8---tatijab.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/divigevokewavibizosile.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202108232248436963.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc810b7fceb---gusitipulilagobonuxita.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/rewawatetow.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/j21073an7bjkmmloaes5st3ft3/39765827731.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/73345682974.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/45337590441.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/99455679393.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/58114851673.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/72f98c6047caf304fade0f665cf39f3d/wigusaxewurunabazin.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/winaluvonudatamazazu.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0795ba44c3---xupepog.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/96619d16dde1b34a71e8b0d1d87fc0dc/36851823690.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16102b0412835b---70269815521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=simple+present+tense+lessons+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_off0000cf42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF42 10572 bytes
SHA-256: 042bb079f55888c01c986ac0e58c6a9ef92f56a3befa7c269fe2ce62884b623e
font_01_sfnt_off0000e742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE742 18316 bytes
SHA-256: 43a82a93ee2cc0a213ac818105138b775c9adab6626ec7f5488b5bc9621db525
font_02_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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