Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f02108aba51053…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 07:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1dbdf75452df87c618fd738c160e1b4c SHA-1: 92feaa8f616ed42a2021be6b6012ab46642c91d9 SHA-256: e8f02108aba51053f6ff8e2184d6efaec771871010a03d8d11b8f25f68f3fd6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple compromised CMS upload links is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee31012e4---1469640353.pdf In PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/41838024860.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/mewalipudivifubagex.pdfIn PDF document text
    • https://chp-travel.ir/data/file/7002670335.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/zixorokilufijiguvenolu.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b864ed06a2d---tosatudi.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/31410566582.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/kopozeviludemesetabavopi.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/24383107467.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/j6aubul7j7heo6ve39vqc44hb2/32687821745.pdfIn PDF document text
    • https://xistenze.com/files/files/bofomubotugezavuno.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f517109e---jejugumokonawagivajuliva.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d6edaed2888ddbed4d5ac871f9f53a04/korebuniditupevekujawox.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/aiuofeqkrmu4ikeh3vdbboocrq/tibulibisegafagawedexuli.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/91015061694.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a181ec0d---bowawejojujogetonotew.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073474a823c1---37812702002.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g6arpqqcm1eljq8jfdu7u2s0q5/fitolaz.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d45b6c7621c6774bffd3634789156029/8846391885.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078027e5a8a9---movenuzosofafo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8704c74cb0---82302718617.pdfIn PDF document text
    • http://domplus.su/userfiles/files/kakofomasagukazekajar.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/5953998772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=caring+and+empathyPDF 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_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 17392 bytes
SHA-256: 1c9f4627f4661f04e9da10d29dc0bb8f95e44a9d16126d5b6c0074543aae9257
font_01_sfnt_off00011904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311B 10648 bytes
SHA-256: 9ce2625c80c68b6c3b29b09feca13fedda8010155c8bdd76ce7a3313e8dba6fe