Malicious PDF — malware analysis report

Static analysis result for SHA-256 e629764d27389506…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 16:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 760975ef5e20ba0f9b4d198d56c2b99d SHA-1: 5549c253d7a1312d10ab8e0590e148d5b7fc8764 SHA-256: e629764d273895061bdde60c5d3cebd4d4c8cb8dbffa59402a8e21f26cc6c949
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are benign, are part of a pattern designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130d84ae6097---42020747605.pdf In PDF document text
    • http://quatanggiabao.com/images/uploads/files/nefozirivumopunireweropi.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/zusokominanili.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/24565092523.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/buwiluvapezez.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/6227879392.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/19874861787.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/bafenubabufaxokuwuladil.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/nebogavifulefeme.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210908202958.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/11037534597.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/95656249360.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/juresume.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/88804740852.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/dakunezude.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/vivatiwamovonuwuner.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/xiwedixakekivesonowut.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/kaxowogitubabuza.pdfIn PDF document text
    • http://sdes.in/uploads/xumimu.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/61155295145.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ncul3983pcl1mtv4i7k23stg32/87963106515.pdfIn PDF document text
    • http://calisnt.com/uploads/files/23618928773.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/pexovukop.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161325d65212f1---firotolazedopofunejupe.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/98434419083.pdfIn PDF document text
    • http://rhondachem.com/d/files/53077731581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=photoshop+tutorial+pdf+filePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 18332 bytes
SHA-256: ab41fe2e8f8ef3b1270ab5ce1a17f2a02486e3f196a9045e17338b0a1dbfbfaf
font_01_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001223e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223E 10592 bytes
SHA-256: 42535ef48a338e62d2789e6b255ad874875ed68e23ab4ccb8a4a7edb69c15424

Open this report in the interactive analyzer, or submit your own file for analysis.