Malicious PDF — malware analysis report

Static analysis result for SHA-256 6026d005761c4ce8…

MALICIOUS

PDF

110.6 KB Created: 2021-06-18 00:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b764261de46d9d65e870e7033828111 SHA-1: 1626c38824a0cd548891bb4fe72bef1669330862 SHA-256: 6026d005761c4ce828403738465100d4c715e34b483c5dc32284e6a2097be3ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host further malicious content or phishing pages. The presence of numerous external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/uempj4g7fot9tuu42eaqd7jf8q/35517432868.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f0397da56b60f1707a7cf3304776110a/tenizibagiwoki.pdf
    • https://ready4use.ru/uploads/files/76100627969.pdf
    • http://daehwa.info/uploaded/file/98018765073.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/90d4lpihc8dh5tubgk72i2bufk/89292543154.pdf
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/nakapojedun.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607821b8dcae6---momexojegazozowapuvuwa.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/92b5f5525b67c0337502648353afb7ad/5349104378.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/diwaletorexojeg.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bcad21987---78064677896.pdf
    • http://libertyquad72.fr/userfiles/file/wadereralun.pdf
    • http://pamatudarbai.lt/ckfinder/userfiles/files/dujawobuwebo.pdf
    • http://ipllaser.in/uploads/82681225922.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c917663fc399b1f63faf4dde4dc0f224/93757940730.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16086469f9a23a---40993683974.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kruti+typing+keyboard
    • 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://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118c7.bin
c217ad271e7765934365ff3c58efd6b9deada89587bdf72030f71739595d025d
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C7 5072 bytes
font_01_sfnt_off00012a0a.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 3720 bytes
font_02_sfnt_off0001356d.bin
e2fcfc34371528186666b79e3ee573f0508f46584298f481e0e24cf16c222c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1356D 11752 bytes
font_03_sfnt_off00015dd9.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD9 16092 bytes
font_04_sfnt_off000172a1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x172A1 4324 bytes
font_05_sfnt_off000180a2.bin
cd98c47359d24d3c75bd77a02b296b4802535eea9e9a7cbc2492c6b6fc33091a
pdf-font-stream PDF embedded font (sfnt) at offset 0x180A2 14432 bytes