Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c62c205a9f5aaa…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 00:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11264f27826ce8cab3494a418f577cd7 SHA-1: 92f7c621d69ad4daeb1be48a35416daf62bca709 SHA-256: c2c62c205a9f5aaa571b41a3e06a460c15d100688676c6231fd92acfbcf668ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of a link farm and a download button lure points to an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607650512b7a1---rojegikavusofovuwi.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160790299f0dab---bewafuzivuwologakuninafix.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tq9h5pdn0tnipo9bn775kvopl9/89166744474.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/a4faca7d10d158a59a28951611400e60/77364248397.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/5a2ae6aad8de90c451b53c00f04fdf9b/55815414048.pdf
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/dejedoneturidobifikosuxif.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb2961c63a---rafikusone.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0363613b90---xosaliwojibugusasuga.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/da1445c62fbf3233f162326402e1e2d2/74061380441.pdf
    • https://stef-nancy.fr/upload/document/rutoreduzonu.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160af4dd0c78e7---9315785154.pdf
    • http://flynewsletter.com/uploads/file/bifob.pdf
    • http://curry-box-deluxe.de/userfiles/file/94807806894.pdf
    • https://alianzatours.com/imagenes/file/xegilevuse.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bcc4eb2cc---mupakegagipizato.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/84807856192.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e39c3ae14bbc7a6936a682a331dca576/fugatodikamobiwafekepe.pdf
    • http://goldartline.ua/userfiles/file/26672202931.pdf
    • https://ludifrance.fr/userfiles/file/25699244587.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/857d9cd6b496a8cb8314dd202c870bff/64715725775.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/3d676037ef71948f92b1c85a123c797a/semuvujipul.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/c9a852c7616e137eb6b6b317f1ad0f88/xiruvazalo.pdf
    • https://costabravas.com/uploads/localidades/files/fodubidez.pdf
    • http://brainbond.ro/userfiles/file/sajiboxibi.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb185e32a---54218588582.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=contract+extension+agreement+template
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e616.bin
de93caccd918949eb640ab197a49a97e5fd7d44cb2b1cb6b8ec76fe1ccb1712b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE616 19064 bytes
font_01_sfnt_off00011723.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11723 16792 bytes
font_02_sfnt_off00012f3a.bin
18290d92be2a5343dc12e2a670e3ed1e94c95aa92d9f7a98aa7c3d9810b81453
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 10848 bytes