PDF malware analysis — malicious · 16084827a202dbab

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 23:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ddb086ecfb24f7a43908d60339e9e1fc SHA-1: 50d6d09bcba1c227167ef9fb49f3390f04d4565e SHA-256: 16084827a202dbabd33d1115e420d9c3c2ec8d494533b7f06f830397e4a59b89

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware delivery lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://cartopack.com/Images/file/konivagixivixuzozir.pdf In PDF document text
- https://stdtekstil.com/upload/ckfinder/files/53558162838.pdfIn PDF document text
- http://abwcoliseum.com/uploads/files/38918575989.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bdc58a9c6---13861759145.pdfIn PDF document text
- https://piataafacerilor.ro/app/webroot/files/userfiles/files/23747465318.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/d792ffd83938347875de601454a3625d/55829421789.pdfIn PDF document text
- http://tevukasveza.lt/ckfinder/userfiles/files/91941453704.pdfIn PDF document text
- http://zonwering-nederland.eu/ckfinder/userfiles/files/11586497368.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2036d89ce3---vinokexinagudiruwi.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce3ea08987---bevorurukabokojotelizosa.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d78cc0d0c90---73513779150.pdfIn PDF document text
- http://studiocalcinoni.com/userfiles/files/kasaja.pdfIn PDF document text
- https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/3eb619fadff29af4435e41c25f966a09/11240629109.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9e0babfe3---55192000394.pdfIn PDF document text
- https://eetravel.net/file/71325109162.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fdf064435---zevedaneramapafedixezipen.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/qv4ts19qi8l7plsqc4rkkok0tf/jijoweweme.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37a3da615---kivumijawolo.pdfIn PDF document text
- http://shengnabei.com/uploadfile/file///2021081512101475.pdfIn PDF document text
- http://artediapharma.com/upload/files/77016977982.pdfIn PDF document text
- http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59443272506.pdfIn PDF document text
- http://bestofbeer.ru/ckfinder/userfiles/files/32469810031.pdfIn PDF document text
- https://festival.bg/fckeditorfiles/file/55996638196.pdfIn PDF document text
- https://juhaszautovill.hu/userfiles/file/lujiwapabosijonufi.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/89cu02mfg0jdr8sdj9li3pnnkv/66363812011.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/o2f3bcndu1irrr54b6g62npq01/35659041814.pdfIn PDF document text
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/79bcd2d11ac130b1ed92e5d5f2bdfcf8/38346840758.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=organizational+behavior+ricky+w+griffin+pdfPDF 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_off0000e3a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3A1	11312 bytes
SHA-256: `aaa1b5e91cdeb8edd94b491ee1b5c3098d2e43c9c74c8e108bfa13fe8a394a07`
`font_01_sfnt_off0000fdde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDDE	17572 bytes
SHA-256: `4bd10fab1dff151f29b8e6ba6b3e86a610e5a39712bdf93c9ee499bda3443d7d`
`font_02_sfnt_off00012c14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C14	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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