PDF malware analysis — malicious · 49c5dc7a9d541312

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 19:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 726fb0014503fc70cb653f0b87b01bae SHA-1: fb628c94a33ba369b796b4f1b7a3afeb1ceb9558 SHA-256: 49c5dc7a9d5413123eabc0a7d2b16e52e3638a4548facbeee44b7ce71e7480a9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a link farm designed for SEO manipulation and hosting malicious files. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://coretry.ru/uplcv?utm_term=divina+commedia+semplificata+pdf PDF link annotation
- http://zionhillfirstbaptistchurch.com/clients/73368/File/49741210086.pdfIn PDF document text
- http://ippon.lv/uploads/File/30822299680.pdfIn PDF document text
- http://szkolaprywatnaleszno.pl/userfiles/file/9219809475.pdfIn PDF document text
- http://mygotour.com/FileData/ckfinder/files/20210707_2DD858B03B9DC5D7.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812c25c949e---79875369121.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/70ad685ce1539f001f2624c89be2ab48/31415727637.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/noxizebasituzobatup.pdfIn PDF document text
- https://betalinktech.com/blmedia/file/nedeguserosifabaropi.pdfIn PDF document text
- https://davidfoleyinc.com/userfiles/file/6964700831.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1b88ca32---15457486206.pdfIn PDF document text
- http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/14039912490.pdfIn PDF document text
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090adc781803---3565312884.pdfIn PDF document text
- http://rowsontw.com/shopadmin/upload/files/kafedakafu.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hap3imvou4m54dhg2d7atroku2/vixepofuwizawojifebozinax.pdfIn PDF document text
- http://kamerton.nl/clientfiles/66163363769.pdfIn PDF document text
- http://ideatity.com/ckfinder/userfiles/files/lalimixikefarusoz.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160853cb75b4d2---jumobokiva.pdfIn PDF document text
- http://avatars.ru/userfiles/file/34696165197.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/016852e80f697e284cac8f13d89738bf/nidam.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16119ba9fe7abd---zezivude.pdfIn PDF document text
- http://tantex.org/tantex/tantexuserfiles/file/7261536109.pdfIn PDF document text
- http://stalmost.pl/userfiles/file/zubozikututixos.pdfIn PDF document text
- http://waterreducer.cn/d/files/laforul.pdfIn PDF document text
- http://alkanboya.com/files/file///sigiji.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607087517011a---tazuxelowimevafuzi.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/9451fc15fabadfd4f66cc81479341657/gelavelavukoweredor.pdfIn PDF document text
- 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_off0000e065.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE065	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f87c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF87C	10748 bytes
SHA-256: `2412f41962b3c9bcea5b350f23ddbb32b53ed59524a3e8435b87e05d5f1b04b3`
`font_02_sfnt_off00011137.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11137	17404 bytes
SHA-256: `b0f4e4c4748650cec4c81f827e9d0f5d78b32908d4c031fa8439c31a695f6a67`

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