Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a24950efe06129…

MALICIOUS

PDF

89.1 KB Created: 2021-09-04 06:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d2492167b2f257bb5d365d75a6a7e4af SHA-1: b52e9b6fd44940147f45599cbe24c4b0ebf5ff68 SHA-256: e6a24950efe061296e1b788f20963211485be68b3cea4007576b2fc6e92b1eb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing campaign. The PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://299-45.com/CKEdit/upload/files/zanevowoxu.pdf In PDF document text
    • http://ck-tct.ru/userfiles/file/mezobikila.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/bitumudekelafanenusuxine.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d81e79d44---tulomajuzaja.pdfIn PDF document text
    • http://cartopack.com/Images/file/vemokogefopevav.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/52662816002.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/7ae27mb1t9i4unslh9i2os72v0/xetorej.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada04ae9ebb---wekikarojud.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/fatafemimiwa.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dbc5c22d4---rurekamonev.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2fd917cd---68012540549.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/vulivebavovekesuxuwapazun.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210606190929.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/lakamiwowovizuf.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086830990996---58160361824.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/pqse7o9mrnhvr3hts27jc1p8cd/54123018013.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/14803730836.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/68f1c5e605bf816be61cf9ccfaf05ce6/wopasolonaman.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210831_071155.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/3769382647.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/72fde9395486cf31ffac6f5e5ebab755/4766264929.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/200254370d8ea756a962618fbb10c72a/57113189048.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/lf8v71qlu9pgsilk5aib8n3sk6/godokajewifoxenokaw.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/wigigefibiwisidofabor.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/tapowazefilubap.pdfIn PDF document text
    • http://clarasonic.com/upload/file/bujixupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=drop+down+menu+in+excel+from+another+worksheetPDF 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_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 18856 bytes
SHA-256: 6cb40693834f0286070bcfef0a5ecf1367bf8cb186b7c7cde2947339ec03435e
font_02_sfnt_off00013d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D17 11268 bytes
SHA-256: d2af6db914ff6992ba33170950dd256e49840cf136d3a6834046902ae8f12e63

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