Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6a7e4d1301a5ce…

MALICIOUS

PDF

94.0 KB Created: 2021-07-21 23:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 907f5d26cb8f858b0f2c66547a59d184 SHA-1: a4b5cf9bb6e0caa950d0108a4244162de9e92a66 SHA-256: eb6a7e4d1301a5ceb20b82a496c4205af79f3ca0bac5f50dd64b36725c93093d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The presence of these links suggests the document is intended to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nawooelcs.com/upload/userfiles/2021/06/files/210611211645.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2366334a94---ralagugavoxobugakupavabat.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/bexuregezibe.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3b048415894b5c5a574aec8222b0225d/vazitixokevalusemotesof.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc269676b---22785006156.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e9298b151---manezubanekewunotil.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/uqqp2o0b85ji0gjket91li1u2t/kafosadumoxevejigaduzi.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/2710182197.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/99473185503.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/bewune.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/fd5ade2dbd0ca88915a5f5f53fda439e/bitexabotugolevu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/e6eea5e138f9c56f6cf5aeb664ab112b/dunitojowoz.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/zepukulavuxasotaso.pdfIn PDF document text
    • http://potlista.com/file/files/7677068738.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607682258d2bd---88059559115.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/37483537696.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/pifegujutewe.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/66041698964.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/750cc8e9bfa1705311dd207b2da3d598/getifojuwunenisipe.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/fqvprbf7ruj61j2c70mv9455ob/84839342418.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/zipasudojifapenokisogaxus.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ac26cda3b---dusunebuduninuledaz.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160d35e7d8ce99---86326645393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+far+can+a+22+250+shoot+accuratelyPDF 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_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 17272 bytes
SHA-256: c70ff43a0d90de3b2e0044c0942753219a826eff6f0d3e3e0f27a59d6ae589b1
font_01_sfnt_off000138f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001510b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510B 11008 bytes
SHA-256: c3b25b0fc58f6aadf9af1cb20ed60a6560621a6a23b3891fa5dd514c6021bc8f

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