Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ce0ee121ea14be…

MALICIOUS

PDF

73.8 KB Created: 2021-09-02 04:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ceba982494bf795c814977c5d1f33743 SHA-1: 85ca7aa98eb5597bb3321e4237ee5aa874cf1e0c SHA-256: 22ce0ee121ea14bed98a9ed559b9ee6897fc55babeff83d9210766003458a0d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised CMS upload directories, indicating an attempt to host malicious content or phishing pages. The presence of numerous distinct hosts and URLs suggests a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/sujhmt0emp0cpmjrbges0lpv83/suxebef.pdf In PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/rajuganaxopivakivibevulo.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/npp31v0jhp125jjpn0raoqaj37/jifaxasigafojejetugi.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/malem.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/51f711c89046d8544578c813222df678/7185754355.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/panumidemoveruboxezed.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b9798abb1---jipepopixupizelu.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/danunojobuvezozawude.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/21b68c1daea61d685a30534002066df8/kebemeratexukawikite.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65d1011e6---dutabapijozenor.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/394690614eab9cace4f8081a296c476e/87344558553.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160df71214a98e---zetodomo.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/e8d68cab861f3dffd6eac0f571a490be/fagulolubakagavu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161276959992bb---58902820355.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/budorugowafemizisigaf.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbf4ed19c6---xexadig.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ad802e32---jewenaravexadafoxaxaxerej.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/0vavqqposoulskq77dnhsft82q/66804604536.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a1722d617---gusirameditajigu.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/gifadumuwiruzotekur.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e70e034ab---karojefeni.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/316f4ebe41527031aa353c3ac4e4f6da/dopewuvizudimotebozaput.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1de117ed1---16882719578.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608512b28bf62.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=word+with+tPDF 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_off0000c253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC253 9812 bytes
SHA-256: db619f29fad47c86a21717b17febc04ef7ee5f6fd36a678267437dddd933e593
font_01_sfnt_off0000d7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F7 16252 bytes
SHA-256: d4b003fef4d74d9c6d3333ce9abb59982d792f0623b6ee9210bbc932fbdab509
font_02_sfnt_off000101a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1