Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbce0f54906e3a67…

MALICIOUS

PDF

75.9 KB Created: 2021-07-17 14:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d7675d778589cd6ae58edf189632e25 SHA-1: b14dbc9610463ce56cbf601b5ca1384462ee53c3 SHA-256: bbce0f54906e3a6714ca880a24b3504870bfa36e80d6ea5f36b9264bfe640ae7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://southtours.com/wp-content/plugins/super-forms/uploads/php/files/otej7hanlnnij5qqgvsj4dvuj6/79682868971.pdf
    • http://thebankcardservices.com/uploads/files/neraxitatavag.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095c87507947---29501496816.pdf
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/90036367871.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be10b6216a---gixorepenidozalisomubaf.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079e55c5ae45---juvijomoketutukim.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e516fb9b2a---4572533838.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a3148986---14883608158.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755b55ac4ec---pupidekerujogotopa.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607452eae2014---51753461505.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9aa092d4f0f6608bd916f59b54032da9/bamalixuzokukirexopukasun.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071752b4d81d---subuduzuxozuvusazelu.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c8fb0c15---42341221180.pdf
    • http://akicgiyim.com/userfiles/file/besuxosuduneduvazex.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/l17iul2k9u55mlsatkui65ieg0/jekeputu.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/3280f0dfbc7f43d9b8cf83b05d1c299c/susizufis.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071696c7c0d6---jubigonawazavoga.pdf
    • http://fzsvybbs.at/userfiles/file/jujelibifizo.pdf
    • https://parklanehotel.asia/userfiles/file/6749145576.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378e860e55---40463022322.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608931dfbc948---tadanejuxa.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23f52bb2fa---kemefebezugubip.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/cd1e74be8a1165aa69ad555723e87a1b/33317333645.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=a+mother+beats+up+her+daughter+because+she+was+drunk+what+is+the+answer
    • 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_off0000c215.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC215 16792 bytes
font_01_sfnt_off0000da27.bin
62fde82e6b06bb811f6aac8d86a5a1d93f65e60b09f37fa911bc64f866cfb86a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 17376 bytes
font_02_sfnt_off00010743.bin
6887017defaf288445af156d9191c5e5fc8e430997f3bafdf010829cfbc3a8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 11312 bytes