Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d2b99d59bc4f5a…

MALICIOUS

PDF

91.4 KB Created: 2021-07-05 20:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30d95e1d46665477a53ea77359bfb9a4 SHA-1: 968e27515f23298e2fcacd9c118e8e2261168a90 SHA-256: 46d2b99d59bc4f5a89f082a2a647affcdf9ccca094aee95ed14424a5782ec299
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160be580a175e1---81709467561.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160781ab430a63---fukibemegi.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfc5ee54b---kepofurafibogijukowe.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a13bdde39---69762322965.pdf
    • http://fly.no1-yes.com/userfiles/file/juripatufifuzifov.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53a3281ea---85246359493.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/77509183698.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d516f1e249310f61d719c1b1ca74a1d3/85084305591.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd316c3812d---latov.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c72ca3523---72497653024.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/a6methalqq9m0j14om9d408p8i/5708316106.pdf
    • http://botosani.ro/img/uploads/file/xoxofosuvupox.pdf
    • http://innotack.com/userfiles/files/37177468331.pdf
    • http://biotop-zamosc.pl/userfiles/file/bazuwabidujeruwixuje.pdf
    • http://asiavent.com/UserFiles/file///xejumoxikupa.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/4735ee72b92b7019a33a42c8703bab2f/ruwitodubij.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607557d3af279---xegop.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/j9f9br544vkieemhjqm0uihr53/kosunegowigofekigi.pdf
    • http://scheidenschiedam.nl/uploads//file/mazamapigemadivafir.pdf
    • https://mokhalasati.com/userfiles/files/26271724161.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/26147227881.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608880346fc37---86385508547.pdf
    • http://kovacsoltvaskerites.hu/images/file/vajekugodosonixudatubudu.pdf
    • http://phunggia.biz/userfiles/file/jovutibitowojal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=examples+of+recommendation+letters+for+nursing+students
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010113.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 16792 bytes
font_01_sfnt_off0001192a.bin
d312c0ed6981f8bba7813723408986ef705120273c07e0ed0ed4e94c60eaff40
pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 11148 bytes
font_02_sfnt_off00013300.bin
fd2bd0dbd7179d884418ec9cfe9f34e3f5064645509b7abf3423d66d9f4e7d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x13300 17188 bytes