Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beefb29a8d3ed09…

MALICIOUS

PDF

88.9 KB Created: 2021-07-18 04:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6849c0eb54e6900c7ce23cd7c5231944 SHA-1: 9607545a239bc38be69a9d462bac2d734f2d4dfc SHA-256: 9beefb29a8d3ed09507f4447aaa6cad14d4b9b5fbf9427554f21cc096344f8a6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations 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 for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://meadescafe.com/userfiles/file/97638557853.pdf
    • http://gayaarchi.com/userfiles/file/20210608133336.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/tmja1iomqcbm94dab2gk3et7uc/naxufojizo.pdf
    • https://paperland.bg/uploads/file/57409947206.pdf
    • http://upoart.com/ckfinder/userfiles/files/89601371583.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/oopbsmjumpn1r4jscqruod8brq/6796987155.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ee88aae6f077fde58714bc95cac309ce/tizazun.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f91f671141---mezovumusovi.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9cd5519b6---90436996069.pdf
    • https://webtechnocrats.com/upload/file/nudobifagudinof.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085e0cf544fa---68625527613.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e76a72f0c9---rolevove.pdf
    • http://amon-syotengai.com/userfiles/file/7872526117.pdf
    • http://locthanhroyal.com/upload/files/76318016242.pdf
    • http://compufoxmail.com/userfiles/file/novamigimebasadepisomo.pdf
    • https://webmenuplus.com/images/file/rosufemezumusaseworotop.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083d6fd1f699---73588011441.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1pvgl9v5fllu6icd2bnn9bgdd4/32152022939.pdf
    • http://ranaghatpchsschool.org/userfiles/file/wizisiz.pdf
    • http://yasaitogo.com/uploads/files/229718008.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/0et96g15jbk6meo3cj2kqnnuo7/munowofunabawujumo.pdf
    • https://www.avantagesapp.com/uploads/files/33848991796.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+can+you+see+an+unsent+message+on+instagram
    • 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_off0000f7c6.bin
7eefb0483722d8c1d7cf864e3dea953424a548c5bd7062180bc49abd133a2bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 10816 bytes
font_01_sfnt_off000110c8.bin
c7ca8f5a8992a62a79cf7a95603ecf565971053ee8b396ccfd88904f5fb10cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x110C8 17340 bytes
font_02_sfnt_off00013e2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2B 16792 bytes