Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ede5a3d32ab7f7e…

MALICIOUS

PDF

86.7 KB Created: 2021-08-11 15:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6094fceafe906cf459fdf66a307ff73d SHA-1: 3cbeb50e0c951152489e437f328750d6b17863f7 SHA-256: 2ede5a3d32ab7f7eeeb053f027e226858da28927e851b5a2e919a7b4128070ae
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://goldendazzle.com/upload/quangtri/files/lagawewawojipoxolu.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/3211890815.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/016c50c276cd8f9c564880c34355b6dc/41726417553.pdf
    • http://puginternational.com/ckfinder/userfiles/files/jiwazimagamu.pdf
    • https://dbmotorbrokers.com/userfiles/file/sojapeso.pdf
    • http://inncredel.com/uploads/46343260129.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608293fc1d44d---bolixijinego.pdf
    • http://color-gateway.com/userfiles/file/44310206021.pdf
    • http://sendedianqi.com/upload_fck/file/2021-7-18/20210718011813196108.pdf
    • http://isspskola.lv/userfiles/files/68826036432.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/37329060008.pdf
    • http://brukbet.com/user_images/file/4966550352.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072137c4d782---15383281265.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da5bc221c6a6af495a059d6d319072c8/61619933583.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/2878c0f31d90a0be1ef1d2a34cd28f19/15283928771.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be6d87fb20---kiwapiluxonefozikiwivaloz.pdf
    • http://co-wemart.com/careeruserfiles/file/67190645850.pdf
    • https://aronabritcan.com/userfiles/file/25376358022.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/92823kvok6jbpadjsj1hltj1g1/62111956285.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/05fb538f448a3581064b5de0f172865d/woziwinesati.pdf
    • http://webs123.com/userfiles/file/80212568807.pdf
    • http://robwalker.net/fckupload/file/74967526278.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+film+teman+tapi+menikah+1+full+movie+lk21
    • 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_off0000ee47.bin
43374cae03fd5fcb3864333e44fbc2ecc704b54c8173b5f7cbe937fe461d5879
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 17092 bytes
font_01_sfnt_off00011b1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 16792 bytes
font_02_sfnt_off00013333.bin
dd8a4fb984c7423b09259b7196978a1fd5219eca3dda06b7e095f49f0193de7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13333 11012 bytes