Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a401a686d650189…

MALICIOUS

PDF

112.8 KB Created: 2021-07-04 00:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8fb83d65c18486c527031242d100efb1 SHA-1: fab434c4d100d63cd78b62e8eb9810816ac46984 SHA-256: 0a401a686d6501895f00f6191a7af8c5b04e6a9a814165d2a38128ca82a1b0ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to exploit users via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97dc06384b---zavoxodesonanolewasifeg.pdf In PDF document text
    • http://leguido.net/files/kipovibodazopeza.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7c39ce574---75025514052.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/lapazobamebapifazegi.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/erfvk2lr1r7n7kefgfea8dlf5v/kowidewiselete.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6700022923db67914fe14beb53dd9874/1077301658.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/73121313448.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/vulasilovogurujijoneton.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/9a728b7fea52e048d6239122c8aa2bf5/legixorexesi.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f9e0a67680675d141c9e6abb0eab9ead/kosuf.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/67e788495a56426194fad5a1ae2b6c99/50715590642.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5c3a549e5e5ebf4b0bde584590ee8010/28967909000.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/fokaxemabogojotejilun.pdfIn PDF document text
    • https://ebooksweb.net/files/file/xawijevimitil.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/ridefowafisa.pdfIn PDF document text
    • http://simonide.org/userfiles/file/74970288625.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/pisudegafuxoputuxuvebubup.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/72cbaef6b63b16d218e9533fbae6665d/62844686195.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/9e6f2a7823fc2eb71fea81c3aac66820/pezozuzudulewizetewon.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/fogadinegagal.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/80089503447.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607523d608b5d---lamafi.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/8835863227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=vocal+warm+ups+for+screamingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 10880 bytes
SHA-256: cb240cc13bb2b14bc0c72afbbdca6a3d63a581b603782c7c817137d8ac6c6b8d
font_01_sfnt_off000159fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FC 17664 bytes
SHA-256: 9361776fe678e492970279c4f49bba4d9a0b62be71de033008bc43698ea67350
font_02_sfnt_off000187f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F6 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00019d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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