Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ed46362ec7940c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 06:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f9768cf00bad80d15bd236843982c294 SHA-1: 63e996cb580c21575bc8b30fed74c296de10cbd1 SHA-256: 34ed46362ec7940c9729f727e4bf5e73ccf4a072d87667b7b64b16318fd00936
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ukt8qu3hk98aonp51q5qe3uqiq/bisejalamiv.pdf In PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/29000139311.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/mujixutegawedixulex.pdfIn PDF document text
    • http://chinalabware.net/d/files/59016942829.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0571a205b---vukuguvipidize.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/vodabikagipamakoxa.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/95482503074.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/xasanemigabaj.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56571f06a---70982660806.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd34dd4201---bodevimer.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3c1451192---taripifogexagi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/f4eimoedcqtlnct8dvoaulcu4g/49362950007.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/66065269956.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/39831402637.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/45600357574.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/47463243979.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/83957916670.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/683563229.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae905e68471---dususesivapenomafogidug.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/92625470580.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/gedofoxoga.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/nowisekaju.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3bfbc03a71---xenaloxowez.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/14840151188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=descargar+libro+duermete+mi+ni%C3%B1o+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_off0000ccd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 19820 bytes
SHA-256: 643cab2d6d257e4b6db87dd37edaf99edf1a8bc83c05c7cb37d87e16f7ab9c74
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A0 11408 bytes
SHA-256: c9b7a98a0911aaed769e54068797a33bc6f4dc252a520b1c61b8ab5eebba8894

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