Malicious PDF — malware analysis report

Static analysis result for SHA-256 04129c45fb7ac14e…

MALICIOUS

PDF

87.2 KB Created: 2021-08-13 22:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8142c7ee011347a33941f16ced9901d SHA-1: b66ec2780928f5e4f06c0af0b5558ff5738ea7cf SHA-256: 04129c45fb7ac14e3634e07d278c76537aedfdd6904dbe33d10ee6dbfc01d04a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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 http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00cc3c90b7---47496960339.pdf
    • http://isleford.com/filespath/files/20210804221307.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c5fbcf6a---welitefekodudizokitowebo.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/kebolulep.pdf
    • http://studiomalpocher.it/userfiles/files/41637343820.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0756b6adca---10866771068.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/2d2ef6f7f78564064e8a401f8c61488e/74459097586.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ll3ep5g6smac3m0bvbpg6rvvog/sebimaxivezoluvakijiv.pdf
    • http://sushigonewildtogo.com/uploads/files/lokemizugodunemewitazig.pdf
    • http://skupka54.ru/upload/m/likebaxewuneje.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607064a043b76---saxavomesunes.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd97a999eb---33283094776.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/33736568906.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef5ef7cedd---xetajelurexikaxud.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f6d135ac324da39f1ca8a15bb68230d9/18886963795.pdf
    • https://alexandrapanayotou.com/web/images/static/file/kiwikunab.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/35e0c22f6e65593c929a235b2b44141b/79567686365.pdf
    • http://quickvideo.nl/userfiles/file/wumikitaravikuwajuzomupi.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d839c15191---finiwinixupaderipid.pdf
    • http://startent.ru/SITE/files/editor/file/30336115353.pdf
    • http://446888.top/userfiles/file/49812981158.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb431dae459---67652237459.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d09811c2ede---96935918917.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/gair9ad4qt68gu9c93rkp4i6mb/72243405751.pdf
    • http://baodieptailor.com/uploads/2021-06-27/images/files/85423083144.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=free+fortnite+accounts+with+skins+and+vbucks
    • 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_off0000eeee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 16792 bytes
font_01_sfnt_off00010705.bin
d214bbbd8e16a1ed1bd6b002b43ddf1d5fe48798d43f73554b6fe64aa94f229a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 10988 bytes
font_02_sfnt_off00012086.bin
a4f480c9d0f9687a40e3cdcf5faddfe0a5f1c86c5a63db92cdee49036c8aef46
pdf-font-stream PDF embedded font (sfnt) at offset 0x12086 17532 bytes