Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa012efdaffc7575…

MALICIOUS

PDF

87.8 KB Created: 2021-07-06 00:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df1b338848b90088de42d25ec8d19326 SHA-1: 837ccf4cf8a394edb3e7338b8d2e04867da0519d SHA-256: fa012efdaffc757596448b20d421d7b3366af09460623d11e50a0c3314d3be8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous disposable domains and compromised CMS uploads, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to host and distribute links to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://naoshima-habitant.com/naniwemenebol.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/fee97937f03c7f4ca7f4c16cd78a8e06/34092011437.pdf
    • http://aarogyamedico.com/userfiles/file/wetulupukivo.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/25612809329.pdf
    • http://2m-m.eu/userfiles/files/sisopojib.pdf
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/kixibawevugegu.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085335949662---dojozojije.pdf
    • http://goodwill.pl/userfiles/file/vorifumafe.pdf
    • http://nacyc.jp/Upload/file/titubusaj.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210616/file/16238398556406.pdf
    • http://unseretochter.ch/images/file/20221338677.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/2363f3c2a1d8ab482a64654d12966c54/wikirujofifuzase.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa4bdbec3---85631252100.pdf
    • http://pk.mo/userfiles/file/11740482063.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9bd941d5dc97718e185ecd9ac6ce94b4/bofofokezosipavamizilekot.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/lelizifod.pdf
    • http://btc-ltd.com/upload/file/rekisizatodub.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4adadeccc8---nakarog.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1a049011268b741fd9a7c1c1fe5ac99e/61287859541.pdf
    • http://harc-ias.vn/Images_upload/files/75997390516.pdf
    • http://budka39.ru/files/limelakebofonexidaz.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/a4877b2d978b97c2b91b21d442531498/kedopigofesuxopaganul.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65fed76981---61574060243.pdf
    • http://rheinmotel.com/userfiles/file/75938592681.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=canadian+first+names
    • 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_off0000f4ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 16792 bytes
font_01_sfnt_off00010d16.bin
bc3305b96c452a89e77b9e0cf0c659fd46943ba754e46767faaf41dc14c530b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 10380 bytes
font_02_sfnt_off00012489.bin
202eec573de2d12d96f1c9dc1a4167110154fe70313bf74928f209a8f12a4cad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 17824 bytes