Malicious PDF — malware analysis report

Static analysis result for SHA-256 04291b2de861d2ca…

MALICIOUS

PDF

92.0 KB Created: 2021-09-01 15:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c683ee9b08219e07f1b03f1ca30ed3b SHA-1: e860a75d66ab9a9ce5e94af69f36776b02b4c52c SHA-256: 04291b2de861d2ca4b88e205f606736ca628a0df2376be167dab88706bb90ea3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://garglob.ru/uplcv?utm_term=impounded+meaning+in+tamil
    • https://togeltop.net/contents//files/gerejubulegujo.pdf
    • http://riviera.az/userfiles/file/4179958255.pdf
    • http://ewtch.com/upload/files/zodovamivepuf.pdf
    • http://cssh.es/img/file/zofotefutevetedagikolug.pdf
    • https://manenshop.com/upload/files/beduvonapixefi.pdf
    • https://bruceleevideos.org/images/file/basekowibunemowopoja.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/64025580667.pdf
    • https://aicsmindia.org/ckfinder/userfiles/files/10869310829.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757fa1cd891---nozarimufawu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c4587b3eb9cc180abef3cfee3e6fb67b/54921639190.pdf
    • https://rugsinc.in/UserFiles/files/movetaridebuga.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607775bc7d378.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2be59f1e3da1306dfc59e012aa4c29ad/dakijixukusisaxekit.pdf
    • https://taxforce.nl/userfiles/files/gadivosixutibe.pdf
    • http://builderall.info/userfiles/file/jupejibola.pdf
    • http://ibookingkr.com/FileData/ckfinder/files/20210804_1E4B485D40AC656F.pdf
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/geripivukajumejapanup.pdf
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/46362492568.pdf
    • http://rcot.by/pics/files/87939142258.pdf
    • https://promise-land.com/upload/file/50611826792.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9cfc35a89cf267ae5aa30bbfbe2f6166/26825565721.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd8ae4913---kewejatawesijozilavidikot.pdf
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/91171822468.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2ef2bec94f34cb43381d9dd87549ac19/14011160739.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_off0000da0f.bin
0eea1cc8420a01954458559939f6dc7946373edf44b4f0d12e22b214c6b916f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 16508 bytes
font_01_sfnt_off0000f0d5.bin
b99828f1d73b91e424f2b5c9dca7f9b18d432b3c98090e229c43892fd22e7b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 25092 bytes
font_02_sfnt_off00013065.bin
d5204f41776aebe0728e3d729314cc0fb7a8ff82a7ee47f400574ecb8081aa81
pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 10516 bytes
font_03_sfnt_off0001480a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1480A 16792 bytes