PDF malware analysis — malicious · 0a6d736bdf5beb56

MALICIOUS

PDF

83.4 KB Created: 2021-07-15 14:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 184c07ceef01b0f9030ce2fa1ed3e9d3 SHA-1: f3d9139d70ba8f344cb7c8f81eb1200c5090f39f SHA-256: 0a6d736bdf5beb56bc35fe7e135d24a0b1b9fb0fcd5d9c2a28054b74d0099f3e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to potentially compromised WordPress upload storage and other disposable hosting sites. While no scripts were extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.5123

Heuristics 5

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
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://bamila.vn/luutru/files/wijerewexi.pdf In PDF document text
- http://security-m.jp/tool/images/file/54495824695.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c115af2da0d---28461832316.pdfIn PDF document text
- http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/kitijutidox.pdfIn PDF document text
- https://eminencesolutions.in/resources/userfiles/file/78920842525.pdfIn PDF document text
- http://smartarts.bg/userfiles/file/bikuvanozedufekupoba.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6bd1836e17b1e84b661a774ebe31612c/59758344926.pdfIn PDF document text
- https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/lixazudid.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/ropisukosusinubovo.pdfIn PDF document text
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f7bfc7af82cf77613a531a4f2487d8f1/99532713424.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c315e1a9464---53758580197.pdfIn PDF document text
- http://www.advokat.com/app/webroot/img/fck/file/botajidofuboziwizer.pdfIn PDF document text
- http://forspeed.cz/ckfinder/userfiles/files/rozojenofubejobodobivid.pdfIn PDF document text
- https://dodatkireklamowe.pl/web/uploads/files/rofipuxidu.pdfIn PDF document text
- http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/mqunkhoa50lvfbtcbrct692bsbb9sbkm/47438038322.pdfIn PDF document text
- http://hattingtoemrerogsnedker.dk/userfiles/file/finutokedetegugev.pdfIn PDF document text
- https://coluer.ir/documents/file/61490806919.pdfIn PDF document text
- http://bjjiffy.com/upload/pukipigezokuvigiwuwumi.pdfIn PDF document text
- https://comobrew.com/newsite/images/user_uploads/file/pojogiguwuraridinaxeriron.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d7b5813acf36e2d23cb144031b875b32/29306985667.pdfIn PDF document text
- http://vetranhtuong.info/luutru/files/dusapetunadosow.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/35006888587.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/920850a0a533ae44d7fcf253279b1680/gebabutuz.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=watch+movies+free+online+in+indiaPDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f359.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF359	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B6B	16728 bytes
SHA-256: `a5ba08c8f3d6457b4ed0f631c0e371f577b320e7e098b1009412d937d9a8613e`
`font_02_sfnt_off000136f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136F0	10800 bytes
SHA-256: `5e17129056612b896ef0d72c6e6b97673c59a08d5c7b48c8780cc5bd054e6f66`

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