Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0ed2b7fdf74f6d…

MALICIOUS

PDF

85.4 KB Created: 2021-06-12 02:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3b50fd375993c27b183fc524a475c711 SHA-1: b1cfaf7d3b436f80e60e66bf6ac991d3127c0122 SHA-256: 5e0ed2b7fdf74f6d8cbd5ffdbba7588970f38ab2fd36978e9f371219ab50b43f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document's structure suggests it's designed to lure users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=online+pdf+converter+merge+compress PDF link annotation
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7fmlpv2i74pij9oqu44t1u6sle/53275734652.pdfIn PDF document text
    • http://nfc.soo.jp/file/82294626360.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ea6893cb7cfed910e4fed8106152bca3/lipadikizokanepuguk.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/ac94d45a297f9c1006ce5e52400a60a2/gapoforebasitow.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/f7d63b44bb2cc81b7cd7193442370dd6/mabokamolif.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/6oc68b8g8k59chj0e32bcj4r0u/61936305158.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/4b22b2b5ffc9936da75d93c3745b82ce/65521515631.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/sugimakiwudigetu.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/43936611644.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089838729845---mokubifomusef.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/306a1da8a2f3d9282d362bb617ae167e/lamojopotewopabufomazoxu.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210513230344940.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a393a8487aa---93731609634.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2eb55159a---89439867466.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaaab9d1d6---22340440472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 6568 bytes
SHA-256: a4af041a1f0d4c38f6ad1bf96ad04d86226b7158e00c36bfafa620d2932d04d4
font_01_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5352 bytes
SHA-256: cc25eb71d3f04dcd7b939f75a0a47f3010ef69241cd44d9eae3304b0b0fc44e0
font_02_sfnt_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 3372 bytes
SHA-256: 84eef74185f5f52f75516e6ae999caef33aa0d0d29ae01705dc7c3080bb9339b
font_03_sfnt_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 10996 bytes
SHA-256: 29b4d33d1e03f8f9391a32a0a21551175e54c213f6df61a7d80fedb210fee327
font_04_sfnt_off000133bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BC 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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