Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda177fc3f886487…

MALICIOUS

PDF

110.5 KB Created: 2021-09-01 12:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e12ccc182792405f0d6088cde57959dc SHA-1: 45eff27261cafdb96e07583dccd1720362e140e1 SHA-256: cda177fc3f886487720dd2182a07b5ebb6bdd428e0147b26e9b498bf8c210fc4
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains, indicating a likely phishing or malicious redirection campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://osakaav.com/userfiles/files/39485482612.pdf In PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/b29d05de009d97e1d7fffeac0f7c4915/56600480876.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983b7fd57fd---91955056654.pdfIn PDF document text
    • http://meta-min.com/files/tenetirofonuzobuvo.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/80683410433.pdfIn PDF document text
    • http://aimic.com/userfiles/file/49967437909.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/nifuxovebapizagal.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb188d667d---ruperow.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/xokewak.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ela0si5j123a701sbubv49a1oa/53469439828.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85806437ad---19617901600.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/53708367957.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/227iqdtemath87tjnog3b5fcct/62669270114.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/i8g60sht6e7q4bkr12a5pjv701/33179351333.pdfIn PDF document text
    • https://adikkedua.com/contents//files/rugip.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/lgivu80boj5u5adb4tcb4p5fmj/vabulobexodirusip.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/803f74bfed5bb2f2c8b3e65d91ce8ba3/79560779437.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/8333182111.pdfIn PDF document text
    • https://tmtteks.com/files/rifizilutovewazowobawejo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d62aeed894d056b58bf4980dc3f42382/65791166115.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/kizisaraseliri.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7e6c2c6542aca41cbf3ea38fd596466e/nelijixurebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=king+harald+v+of+norwayPDF 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_off000141bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BD 10492 bytes
SHA-256: 430a2574e6eff94108138357ecb7cc76c15e9386ddf5b20ec7ecc01ae29d37a0
font_01_sfnt_off0001594a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1715C 21436 bytes
SHA-256: 4d9af27b89be0ac81a0f32674052b64a13521479ca63d9882ff1e0004de21909

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