Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e726396f2789bba…

MALICIOUS

PDF

79.7 KB Created: 2021-06-28 05:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db376cf635d2d3892380509787dbc09c SHA-1: ce31ec6f7f51e2643bb926db77b3a66f9bcb60e5 SHA-256: 0e726396f2789bba8a97ea4ed350a62b6060cb22c52d016e7ae876c1e4c2dfc9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous compromised or disposable hosting sites, likely to distribute further malware or conduct phishing. The document body is unreadable, but the presence of many external URIs and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893ceb25438---juvorepupajofo.pdf In PDF document text
    • https://louvre.lv/res/wysiwyg/file/zemupodemo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaeefafe11---41456350516.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714a83a5bac---wupefulifenetunasijutajo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/bumizamixeminap.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/75021799829.pdfIn PDF document text
    • http://ashioke.com/images/library/File/bajiboverojiw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/lunusugaxomegimimoxejabo.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/33729079962.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607451fd82cc1---madupidagopomalamofo.pdfIn PDF document text
    • http://70sromans.com/clients/871711/File/90833649310.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607500abcfd4b---bodujafateri.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/goripofewimidubute.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160997a24792b6---86780944158.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/7133025665.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/61869978644.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/tonasidiwuwekef.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d37f3fc2---diker.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895f03447a7---68973365330.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798c000d4bf---45131040383.pdfIn PDF document text
    • http://cloverdiamond.com/file/74695045117.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/zunevikifitupodikobezux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=golden+canilla+parboiled+rice+nutritionPDF 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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16736 bytes
SHA-256: c3201d9fb9981055cd929125c4d69ade455f23b606205a1f846f45a8a705ab25
font_02_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 10620 bytes
SHA-256: 90fc4468ad0d731257c99ce32db117ea7cfa0c7478774b766aa5c63a0d9c9e44

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