Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec44adc1c73ecfc…

MALICIOUS

PDF

90.3 KB Created: 2021-08-31 20:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 70ffb0eeecdbbbb001c4306cbee634ad SHA-1: 546c9cb880b14b9f3e2741badb86fc441483b77d SHA-256: fec44adc1c73ecfc28f23ddf310db2a5b5fb1f16a9668911736cea0f330fb7b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/q6pa29cr43fh0b4r4lhk6kdp5i/kojawamewiga.pdf In PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/3faf4bf56f69377ecfaef1cc5ecab2b9/xuladivunefidoxudejagofub.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/36769659585.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/cbe116355d87a230059ffcfb1daf8032/xubevunirus.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/9otbfkml16n3bds2tnd3g7nvu2/84663903194.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b355170667901089bfd33f983632ad61/vinuvaluke.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607811c9743e0---kimoziribotani.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/risazukox.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a936a17ac2b---31017764038.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/nuloterusipisa.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/44981934915.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec723d4b87---66916026781.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/71589935074.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///gaxerurividojizadaxe.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/pakenutolijugezuwif.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/en6pehph7utsblk4c3ra5q176j/jajojitewej.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bkumij2nsuim53vkblp4j7q3dl/vusibamavekizixes.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/dijadevokuruxetu.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609840f08ab16---3204209641.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b84a2ed4680---taxasajug.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/misajivatelok.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/xexumuzowumazuvejo.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58db29f0d0---pefisego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=equation+of+line+in+3dPDF 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_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11135 19268 bytes
SHA-256: dbc618f639bab5e62b8a8aba162bdce518d77ab3f27e04d228ce3da69ca17106
font_02_sfnt_off000143f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F6 10480 bytes
SHA-256: 5e320b2d754ac20c2c75ea8ce7f9baf778986adbf89cf6c51e6a5855843651a6

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