Malicious PDF — malware analysis report

Static analysis result for SHA-256 767ee3e9eb66100f…

MALICIOUS

PDF

86.8 KB Created: 2021-09-06 02:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7bdc591385b216e3df4a82f5642b456 SHA-1: 7beb99df6fbc155c8b2000568615936c981597e7 SHA-256: 767ee3e9eb66100f15fa16d0d3bf7d29f3fca7d8533644ec08d9885e4f31cb28
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of encrypting payloads to evade gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://hazeloyun.com/calisma2/files/uploads/sapizeluxes.pdf In PDF document text
    • https://bloomland.com/sites/bloomland.com/files/mukibujoruvefabeje.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/zoboxikodusakapaf.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/witerifesawulo.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/19599546440.pdfIn PDF document text
    • http://dgjst.com/upfile/file/wazedujevorune.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160830dc817592---70493526169.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9a104de5ab24ba474f5e081f0a5d3a7b/83133096655.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/99973421535.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/b23e8306328b02d7f025d16f1194463e/21114123967.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/63182999334.pdfIn PDF document text
    • http://ekotronic.eu/files/file/9177730963.pdfIn PDF document text
    • http://teresachild.com/upload/files/45141751535.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160848b13cc303---sotaxodogusinujidovidi.pdfIn PDF document text
    • http://aweibel.com/Photo/file/zovakaz.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/37139885431.pdfIn PDF document text
    • https://dalba.net/other_files/File/72790558468.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c885d0f4098---77977706068.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca11a6efc0---65309839763.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae22b318deb---5512752003.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/damurijukemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=western+digital+my+cloud+pr4100+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_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 11420 bytes
SHA-256: 5b95713ce90f9554b263c4456127e98e6708cfb0e118d9226b94d2004717f497
font_01_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 17964 bytes
SHA-256: 6831089d55302aecbc355b764e2c51e8e37979f547391e24d07a79cda7130298

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