PDF malware analysis — malicious · 69894b97fba7d47c

MALICIOUS

PDF

88.9 KB Created: 2021-06-30 01:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 04d20122f7222ffda95d6f28df2bc18d SHA-1: b3a9b63860e9de94505ecb59014a8d8e8beb965e SHA-256: 69894b97fba7d47cc323cc98fc57f6380230751f6bbba8481acadf007081d9a9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of link farms on disposable hosting indicates a likely attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fc8fbee5e---72210231558.pdf In PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/kqgc7ni3a62nu58tle6cm9sbsd/41198651644.pdfIn PDF document text
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/766804e955c032522e50ee8e4edac1a8/gabufidiza.pdfIn PDF document text
- https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/uj3kqmq9cv4da1nde0j78lkub8/mepodifubupuvalosaki.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a627b096ded973cfd6d3a689b358bdcc/keraxotovitumemaz.pdfIn PDF document text
- http://matsusushionline.com/uploads/files/52329247189.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e7633c21a---timawiw.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff4b46702a---8169078288.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160736dd1d1ef1---7446950173.pdfIn PDF document text
- https://asset-books.com/userfiles/file/81279426363.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4dac42de2---28477174159.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/tejilonawimuwenijud.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d5e5ddda8dd3c3cfd7e0cadf7e2747d7/nadajarujemakonizola.pdfIn PDF document text
- http://www.cerathai.com/image/upload/File/38551928871.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/6dd19dh21dg0hm1bbooraqquqs/dositedugisab.pdfIn PDF document text
- http://dui-antidote.net/images/userfiles/file/79350893687.pdfIn PDF document text
- http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/30583115424.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b6f0bf489---fexowog.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cbc63ed51---211679042.pdfIn PDF document text
- http://alexanderjamesbackcatalogue.com/userfiles/file/madonesofiduzen.pdfIn PDF document text
- http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcb949147---50579686360.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/nebafebojumesurawuferurem.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12fd3e8022---jobodonadodidibimeme.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4c66c0166---56637564383.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0334f30cd55ee32c6fdc62fd2121ab12/24573926844.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=i+owe+thisPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f71a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010f30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F30	9832 bytes
SHA-256: `e001dd0d74174bd34ae01fc750c8ab7f9aeae53c96db98ab1b6a262622375b1f`
`font_02_sfnt_off00012501.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12501	18540 bytes
SHA-256: `a3dae9400b705ee737eddaf29fad391be557b0cd54d9c600075f9712c38b76e0`

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