Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8f1dea7fa004f5…

MALICIOUS

PDF

110.2 KB Created: 2021-07-13 22:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62e6487954a6e42c9996a8708a10142f SHA-1: 22f9d348f742339ee768a1d083854a081a352163 SHA-256: dd8f1dea7fa004f55440ff6466e7e11bd2586c3dd06006fff96d2f3e12c1c837
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a strong intent to direct users to external, potentially harmful, web resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/83pf2auoehtdqsf7hjg78e3j73/fuzagawopulosev.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28d3c27a1b---jijaramiribetowokotemura.pdf
    • http://divapharma.com/uploaded/file/11654745402.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/63b52bf394d9ccd034019708855b2028/gijebunilolas.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dogefusarelem.pdf
    • https://alamansyria.com/userfiles/file/wonavilemalov.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/sb3a5kujjqugaml9q98b36mpda/fidelumulubiziwitot.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/uho3q83dtkg8lke3s1hhp16hvp/78709096041.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b1a8d31e3c4758f3cb343de1f4c323d1/92683222216.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/a7777a2eba2b647d36a9fd22fa3d5d94/79059773150.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/a68c61d7d7729d2d0a8583cab1fadda9/dupewawigifekajafivor.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/evehq05mmbiiu2vr704vj47ck6/nutokixifarovik.pdf
    • https://alshaabcoop.com/userfiles/file/fokawinekivapolifuz.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27b78b3d7f---79018437689.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/cpmadusp2iv0r7gt027tqdddpc/88975187087.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d7c38ec50---98717819744.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2b7403aa0---mufinasomasapov.pdf
    • http://djapm.com/userfiles/file/40550464857.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e79389d6c---dugeni.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2874678b5---83249500125.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/qnhepn4uuuj8qhp5mt3nir6k10/99848137104.pdf
    • http://topas.lt/userfiles/file/takotigeropike.pdf
    • https://dietacud.eu/upload/file/51907207010.pdf
    • http://cuatudongbinhduong.net/uploads/files/fabakiguwo.pdf
    • https://grupo-kayros.com/userfiles/file/tadezekupevejitufobafe.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/80179586698.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+little+match+girl+pdf+with+pictures
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001363c.bin
5faa3927cdfd2d4609ccfae10a601237fd421964ba71c626cbf0d091cc6baf3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1363C 10992 bytes
font_01_sfnt_off00014f9f.bin
39046fb95ab6a24f715167bc267d98dac767abafd486c4e5ccb648360aeedd93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9F 19336 bytes
font_02_sfnt_off00018130.bin
387aa4808de13defe9041f59fe86f2289304698dfafff52f47d73345c5b4ec56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18130 4048 bytes
font_03_sfnt_off000190e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x190E3 16792 bytes

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