Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c5db0c9bc9d914…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 19:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 422cd33764cdab4ed1ae059d9c8bcf10 SHA-1: ed3352e2ea5bdba12cb3d51418e4c8f2798a6279 SHA-256: 97c5db0c9bc9d914f89e4d989e082a6dc4418045906de13954df9fb8640303dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' suggests a phishing or trojan payload delivery. While no scripts were explicitly extracted, the nature of the link farm and the detection name imply an intent to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://orderleesushi.com/uploads/files/derarapez.pdf In PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/39490200945.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/vuzipuluzunezozaduwu.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/tefojuvuvivufe.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/vosuribifefudofiwav.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/xagitum.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/56552333992.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/77214887882.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3088eac446---33189306406.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d02cbd28588---67583019215.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/fubugowevonodopekiwugite.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/bikif.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/29214608bbc6f7141d5fe1b2802d445a/44483597100.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/tobepekipavesapuf.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c939e3b2d1---5793936706.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/xoworavizerilakifubon.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701dba9a0e1---wugazufikiwuvewawodojaz.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/nabavudanadek.pdfIn PDF document text
    • http://ceroki.com/image/files/92802298790.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/dagegulogekegogenu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607967a63e82f---tafitixazugereweduk.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/fopomerazarutuw.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be817a72ce2a157d2bd8381daaed6c4a/leposorofatigiwutesami.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/96e6d39a74c1ffbf982725899dc7cfd9/xafesevelalaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=siemens+iq+300+manual+pdfPDF 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_off0000ba62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA62 20316 bytes
SHA-256: 0e197f23719d71afd82a6c228311262baddbe563dad79991bf42bf026e6c8a90
font_01_sfnt_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 10956 bytes
SHA-256: 2ef5f4bebffcdcad4b1679834a765a9ed31c5a282b107210e7c1fcb2dc41a2c7

Open this report in the interactive analyzer, or submit your own file for analysis.