PDF malware analysis — malicious · 78fefec99295f5a5

MALICIOUS

PDF

90.3 KB Created: 2021-07-02 02:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e9a4dc3056744c3372d6c86a0dabe410 SHA-1: 3afa0680fc581a459a0c6d2d744a83dc354deb8d SHA-256: 78fefec99295f5a5b9ba8e55197d7b6e417ca01e38c11b7c8e19886f7a9d43eb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains numerous links hosted on compromised WordPress sites, forming a link farm likely intended to redirect users to malicious or phishing content. While no scripts were directly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/omjuld8gphpj1goqtqvlb3fd21/56276362004.pdf In PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c0d7a14e4b4ecf8c63714cc9a0eb9dc9/70737893952.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb744672ac---43236732392.pdfIn PDF document text
- http://griswoldremgmt.com/uploads/files/65458345008.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/3cb0602505f6a11a8965dda7c3eec2e2/98917501759.pdfIn PDF document text
- https://koreayokogawa.com/ckfinder/userfiles/files/15824017354.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db44199925e---98440800693.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/72cb0dcebe67ba55d11c9634e7212f51/62063233360.pdfIn PDF document text
- https://adasms.fr/userfiles/file/zevubebabekewetazad.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ddd58e00---piserogebuwutonunotenoto.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/jugere.pdfIn PDF document text
- http://hollywoodterrace.org/clients/863344/File/bofituwejarupet.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ed97e34e---rodatakarezilovitudabuzem.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/d1c8ae37cc543503e26a9609b395d5ad/9565891440.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160787d42927ac---97953998834.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd84291729c---rajeja.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/b5h06lh73i5og6rr35ra5tq4i6/zuzuxemigebemuzonuwig.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/9ee3361258655aadc1022f119846634c/51591775319.pdfIn PDF document text
- https://btcauction.vn/hinhanh/file/laperovupineluviridopadul.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894d9cebcba---83353733546.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a42067dfe1---rujuwutunekawijog.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/jupr45464aobtg80q3dokqekp5/41653309319.pdfIn PDF document text
- https://mdteam.se/ckfinder/userfiles/files/savexiv.pdfIn PDF document text
- http://mega-gold.com/userfiles/files/15632827493.pdfIn PDF document text
- http://africa-emergence2019.com/userfiles/file/kotafarelenikumafu.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd045e4654a---3768428696.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=use+of+value+in+artPDF 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_off0000ff7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF7D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001178f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1178F	17272 bytes
SHA-256: `06c7a2e4c6a1253696ae377e9549ef3d29001cf0ad642b361523d23505d3f31d`
`font_02_sfnt_off00014472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14472	10380 bytes
SHA-256: `e47366f60c50274afcc8f50bdb7fc4b2ffdbd4364826a273d66421a5e7bc4478`

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