Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd054afa3a354fab…

MALICIOUS

PDF

73.6 KB Created: 2021-08-29 05:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: e13023fa0b65416c5c20247194936e12 SHA-1: b3f86e1db991f9b35f85f9db71fadd5a53816b6c SHA-256: bd054afa3a354fabf14c522d747491ec70eb093401eba3203c94ac12eb3cc63a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://llsindia.in/FCKeditor/file/41430779571.pdf In PDF document text
    • http://ascensionchina.com/userfiles/file/14344010390.pdfIn PDF document text
    • https://iwistw.com/upload/files/disewavevoluveva.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/65369921443.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882384ce2ac---faxolepaloputug.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/58889195676.pdfIn PDF document text
    • http://tfforming.ru/d/files/sezaboxewalufu.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/ff48d57764554bb5753b62e305402098/89591402831.pdfIn PDF document text
    • https://www.espaciocultivarte.com/ckfinder/userfiles/files/gasokuzatoju.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/rejugofoxatuza.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56e5cd95f9---39555792634.pdfIn PDF document text
    • http://www.manorbymajor.com/userfiles/files/satenapejodatamezapu.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/xatebafili.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/fizob.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/74469800370.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a07bb89ee61---sagezozomof.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/67572660607.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d53052c1---76988526473.pdfIn PDF document text
    • http://reichspfarrer.sk/file/dusoped.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/bepakagivepewijomutagi.pdfIn PDF document text
    • http://ri-rm.ru/userfiles/file/rosukeviruze.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/mavolixekatiwu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1f3bto3etn4dh87lnofibhfa1/kinegekibixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=he+pulled+out+a+ring+and+said+marry+me+juliet+lyricsPDF 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_off0000b42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42F 19028 bytes
SHA-256: 65b2284216ddf41c47acab68a45b49d472645002fef27e0c3e692b7664ba8b4d
font_01_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 11192 bytes
SHA-256: 0eaa338c20e771385e7542532a1cb0d9fa7e85c5ca71cbd7218a0ba7a0045a6b
font_02_sfnt_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1