Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a58c561fccd212…

MALICIOUS

PDF

84.6 KB Created: 2021-06-25 19:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d392e56cb01eff7a7168372600e47ff SHA-1: e215c9c14ee5545ee07723f7338eebce1c67b392 SHA-256: 95a58c561fccd212188017265f983f7720e301e6c53d144373ec74c635d62078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of external URIs and link farm characteristics suggests the document is designed to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://coretry.ru/uplcv?utm_term=sony+hdr+cx500+manual
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/99455653878.pdf
    • http://www.tobywells.org/media/fckdir/file/66660957600.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/sciuv4pvbk4g31kt3jrrr7kfu9/bivuwapibipez.pdf
    • http://tingyi-bnb.com/CKEdit/upload/files/20249515869.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c05a607b8---89530312045.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d64702984f28b10c9eb9f4177fa2823d/83201010106.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16093c487d0927---lenimofem.pdf
    • http://gleneaglehoa.org/images/file/29853896911.pdf
    • http://monkey-do.net/userfiles/file/72230212949.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c540932d34d---94644081130.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb418c23583---ribogibebuzevemaxopawavud.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b9b4689607cda3cfcf113d6537af9c21/57937725246.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/9j5t2ns50vr146fk7q5o5vf99o/14031064422.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/9133a4ca769061e643b0eb210a21fc46/68057357538.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/52790960076.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/01s4pa6v06r8vuv421vq43o4vi/wimuzalonabina.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/rnenu7v0oc90bmu35m4ctolic3/vodokunifi.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/29094302183.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/40ab6b8a79a3068227f7ca5119f77dd6/wekinemafejewevafa.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/a0rr6v3p0m6lm386bu2p7deghd/20417302336.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7eee28ec65---kezebawo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/7g9nt638me13hc816dlrdjg1r7/60266827469.pdf
    • http://forter.vn/hinhanh/file/71294878340.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/a4a72ee3e016b086184d1340628c5afd/31592484564.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094958ccfe76---fasoketevoj.pdf
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/duxitidexawekotawex.pdf
    • 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_off0000da64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA64 16792 bytes
font_01_sfnt_off0000f27b.bin
eaee1e3d2bf1958802adafd450e53de2c5e2d9f48da9400419dfe24ea35ec515
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 10792 bytes
font_02_sfnt_off00010b29.bin
15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 1700 bytes
font_03_sfnt_off0001133c.bin
9d9ac1dba6bafed74f11440ff4f43d08db125fc2e0c00da5c5269633f754742b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 19052 bytes