Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cc0a8feaa56ba9…

MALICIOUS

PDF

84.2 KB Created: 2021-06-25 19:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 804992c8bdfcf4112cf9059b90279f58 SHA-1: 2fe5ce67a7a462e6be056459e6dae37580453a5f SHA-256: 69cc0a8feaa56ba9e5276b3b53d6ad9ffe9f3e9652154cc35ce8bed574a19c99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The PDF structure and the nature of the URLs suggest a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://allytemp.ru/uplcv?utm_term=thank+someone+for+quick+response
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077d50d9e1d1---75172010904.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a91ec4dea94---72775261948.pdf
    • https://daaeportrett.no/upload/file/sapulavafolafoz.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a46612d08d9---40173272945.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cff4c8fd7---fipex.pdf
    • http://tgtech-auto.com/userfiles/file/40211552995.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/fibisipojemupewuxubod.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2891304cbd4f7d784bed2d7da514f942/xawuvipubivuwapowasetuxu.pdf
    • http://spalovnachemolak.sk/userfiles/file/307522815.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b31c88e42---vilobodesev.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42d8888ad---lalilodegiw.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c662cf914---xepinanodef.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0cnb1naffprken3mmnd4i0b4ik/nawujeloromoloxoxoraxur.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9664b2aa7---58531858581.pdf
    • https://tlproduct.com/userfiles/file/tuveg.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abeecab171a---peritobubepuwofixajijut.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2153414140ff0195152f1e57f2da80a4/41907061164.pdf
    • http://brandnewgoods.net/userfiles/file/23602676053.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e9346921---25006840883.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedc48235bb---10071559257.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608322082e73b---xurek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e420.bin
7649cbf068ea075fd40d2ead13d241b69186e2b047daa913403d32129895de1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 17888 bytes
font_01_sfnt_off000112c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112C6 16792 bytes
font_02_sfnt_off00012add.bin
1c963ab09a3907be3c8b3c04983eaa3f0b8461e43f214062a8a890d7d7d2b707
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 10904 bytes