Malicious PDF — malware analysis report

Static analysis result for SHA-256 baad04fe8cb6cb0b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-02 09:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6dceadf3ec2458832b1746e3b68f9dc4 SHA-1: c9d8c1823add988a603fc812c77578b254ba4b60 SHA-256: baad04fe8cb6cb0b50cb2a89cb43baa969b45b1f19fdbca938ac1b96f62968ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to distribute further malicious content. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710f50f122e---86369728243.pdf In PDF document text
    • http://ladyqueen.it/userfiles/files/58802379560.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/57157071099.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/94248321050.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808cdfad423---bojuromoluvomagurevoga.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/88fb3c5f7190123d8ea55050ae82ba0b/5025155386.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/28f04f7023df9c315f36a3cd4cd3f331/wuzawevadegene.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/vipesokiv.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c805ccb81d---rewokonalobab.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/viruwopoxululivumos.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/31156284761.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/45729324e14ce2d66ea34e5c7dabbc1f/90770864821.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/vebekijunuze.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/98274979029.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/wewurafuj.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/4f74dnl8gd2i5ev3en3g5hl3f0/berupesipifimopa.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8s5b265mvfced3qfm1rjvma02l/pipadilozidewoxemufutukel.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/91008104877.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/1472018617.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2903801a8f---migikaparimole.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a073e8e9f86---bevafabizitewufaja.pdfIn PDF document text
    • https://ebooksweb.net/files/file/45656192971.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/45353231671.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7a0b9e097527e345648915071e8e2597/67815841841.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/xutuxusofefapi.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098680b4c8fa---53089507397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+merchant+of+venice+act+1+scene+1+workbook+answers+morning+starPDF 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_off0000f9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EF 16756 bytes
SHA-256: 1b360f654d893fc0b3b0a0f88af152ba244f07ad77b8d2092ca4d626ff05ea1c
font_01_sfnt_off00012548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 11136 bytes
SHA-256: 59d49402d6de0ae11cb7de425689205aac34c182e2dfed9f072c94f67add492d

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