PDF malware analysis — malicious · 9d722f6693436fb6

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 07:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1baf15076943c1bbfc39c38bedb7ed24 SHA-1: 12b1c86bdcacc4201a4ecbe6d3e7522f9fe689f4 SHA-256: 9d722f6693436fb67a8279c3b17c49aacf4e59906336160a983cc9603ee715ff

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript indicates an attempt to execute code, likely for further payload delivery or redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/647d429c908f390b7a2390e434f2d20f/34087413469.pdf In PDF document text
- https://amoslodge10.org/ckfinder/userfiles/files/karikanuvuxugasafub.pdfIn PDF document text
- https://szelvedojavitasmiskolc.hu/files/files/danaminuk.pdfIn PDF document text
- http://innotec-industrie.be/userfiles/file/89250437934.pdfIn PDF document text
- http://regalmotors-jp.com/js/upload/files/ranalox.pdfIn PDF document text
- http://paoladebenedetti.eu/userfiles/files/nesaletofirepumip.pdfIn PDF document text
- https://kaisar168.com/contents/files/wuvuwajalakubasazukuri.pdfIn PDF document text
- https://robert-zauer.cz/userfiles/file/bulujufewesipik.pdfIn PDF document text
- http://orderleesushi.com/uploads/files/xobaduwugorozas.pdfIn PDF document text
- http://syntrend.critical.tw/upload/files/40052843080.pdfIn PDF document text
- http://linklandhotels.com/upfile/editor/files/jixiliwase.pdfIn PDF document text
- https://preciseenergygroup.com/media/jatabamudevaferanedak.pdfIn PDF document text
- http://ozdesignhouse.com/app/webroot/uploads/files/14916956096.pdfIn PDF document text
- http://teacherandtraining.com/coj_u/KK/userfiles/files/dinolavawezofamutupidu.pdfIn PDF document text
- http://cx-gl.hu/images/files/83974296181.pdfIn PDF document text
- http://influences-vegetales.eu/assets/Image/files/8373759433.pdfIn PDF document text
- http://suliaox.com/v15/Upload/file/20219973879269.pdfIn PDF document text
- http://studiodebiaggi.eu/userfiles/files/nojatozep.pdfIn PDF document text
- https://indicaperu.com/userfiles/file/6203759321.pdfIn PDF document text
- https://vibingvibes.com/userfiles/files/90738946317.pdfIn PDF document text
- http://dealershop.es/userfiles/file/gepatemi.pdfIn PDF document text
- https://mb-classic-service.de/userfiles/file/91594881553.pdfIn PDF document text
- https://yapluka-services.fr/userfiles/file/gidowisudibimas.pdfIn PDF document text
- https://csodamalom.hu/files/files/61896511234.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=what+to+do+with+bonemeal+in+minecraftPDF 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_off0000d510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD510	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ed22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED22	17460 bytes
SHA-256: `ec166f4b24be147b81ffbf37601b918bf6e34c734bf4f650f2846512e94ab079`
`font_02_sfnt_off00011a12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A12	10792 bytes
SHA-256: `7a12507768f4da9798f4c2ac84588c8794dd99a722954cc51ffe00640f8c4636`

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