PDF malware analysis — malicious · f2530e43173452ab

MALICIOUS

PDF

87.1 KB Created: 2021-08-24 15:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 299c8564d7c2da184bf82b6b5305ed58 SHA-1: 138aed158b9af2523caf556b7421f0e3f6568093 SHA-256: f2530e43173452abe284ad284e9700ecfb10e57c4db52514d330ea8af09530b4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6676bf5a40098f2354f929ae6a0422c5/507456454.pdf In PDF document text
- https://unibel.pl/pliki/upload/file/81803830293.pdfIn PDF document text
- http://takeacode.com/user/d41d8cd98f00b204e9800998ecf8427e/file/dazonafugapa.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/tvfl0qn5d3796qm235kjqu5g8q/93820588660.pdfIn PDF document text
- https://karinbentum.nl/uploads/file/35483234419.pdfIn PDF document text
- http://netmutum.com/userfiles/file/faxijesovoni.pdfIn PDF document text
- http://gachbinhduong.com/upload/file/femenafesop.pdfIn PDF document text
- http://xingyeknitting.com/userfiles/files/xinebeweritenumaboxabazaz.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c172c598cd8---17804407903.pdfIn PDF document text
- https://kontiko.com/ktkweb3/images/upload/files/10306101032.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a8e2b3499f7924b48159b61216112630/63987607913.pdfIn PDF document text
- https://grupo-kayros.com/userfiles/file/dibanudegojowatadomunesi.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/2481091259.pdfIn PDF document text
- http://dreiseengrundschule.de/files/4718727561.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd43ceacab1---sozevebupawejanavawojopis.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/bd5e315a1a338388a2ec27ee82cd9535/3202018405.pdfIn PDF document text
- https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/1linnlmomtc4e9cg5u6m7hbumj/lobagozutasetigi.pdfIn PDF document text
- http://dagmar-e.de/userfiles/file/dakatalozopodikezerej.pdfIn PDF document text
- https://medsplus.us/admin/images/file/14884034095.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabbf7bf130---jovuperasoxuvubib.pdfIn PDF document text
- https://htddienstverlening.nl/userfiles/file/68087448008.pdfIn PDF document text
- https://dichvumayphoto.vn/webroot/img/files/71418419371.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa708b63a3---16612723706.pdfIn PDF document text
- http://popnmusic.fr/userfiles/file/libixakilapunejud.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=present+simple+present+continuous+past+simple+exercisePDF 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_off0000efb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB8	17296 bytes
SHA-256: `694206d8f4535c35a295f5813dea92caad7c3e5f10898c3b6225e6641f2eef43`
`font_01_sfnt_off00011c9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C9C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134B3	10736 bytes
SHA-256: `3e6af17b8fb609ad1952ecab1cc615caa7f3e8d64205cdd9a9d8ca16683431b5`

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